diff --git a/src/MagnumExternal/OpenGL/GLES2/extensions.txt b/src/MagnumExternal/OpenGL/GLES2/extensions.txt
index 81b986dcb..9c290dfcd 100644
--- a/src/MagnumExternal/OpenGL/GLES2/extensions.txt
+++ b/src/MagnumExternal/OpenGL/GLES2/extensions.txt
@@ -90,3 +90,39 @@ extension OES_mapbuffer                         optional
 extension OES_stencil1                          optional
 extension OES_stencil4                          optional
 extension OES_texture_stencil8                  optional
+
+begin functions blacklist
+    # These are listed in EXT_separate_shader_objects with only the comment
+    # saying "Depends on OpenGL ES 3.0 or GL_NV_non_square_matrices". No way to
+    # parse that so I have to disable them manually. iOS extension header
+    # doesn't provide these for GLES2.
+    ProgramUniform1uiEXT
+    ProgramUniform2uiEXT
+    ProgramUniform3uiEXT
+    ProgramUniform4uiEXT
+    ProgramUniform1uivEXT
+    ProgramUniform2uivEXT
+    ProgramUniform3uivEXT
+    ProgramUniform4uivEXT
+    ProgramUniformMatrix2x3fvEXT
+    ProgramUniformMatrix3x2fvEXT
+    ProgramUniformMatrix2x4fvEXT
+    ProgramUniformMatrix4x2fvEXT
+    ProgramUniformMatrix3x4fvEXT
+    ProgramUniformMatrix4x3fvEXT
+
+    # These are listed in EXT_texture_storage with a comment saying "Not clear
+    # all of these enums should be here for OpenGL ES. Many are only defined if
+    # other extensions also requiring them are supported". iOS extension header
+    # doesn't provide this one and TexStorage3DEXT, however I need the 3D for
+    # OES_texture_3D so I'm having an ugly workaround in flextGLPlatformIOS.cpp.
+    TexStorage1DEXT
+
+    # These are listed in EXT_texture_storage with a comment saying "Supported
+    # only if GL_EXT_direct_state_access is supported". Again impossible to
+    # parse so I have to disable them manually. iOS extension header doesn't
+    # provide these for GLES2.
+    TextureStorage1DEXT
+    TextureStorage2DEXT
+    TextureStorage3DEXT
+end functions blacklist
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGL.cpp b/src/MagnumExternal/OpenGL/GLES2/flextGL.cpp
index de1caad84..a0d0f33d8 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGL.cpp
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGL.cpp
@@ -96,35 +96,21 @@ FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1fEXT)(GLuint, GLint, GLfloat
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1fvEXT)(GLuint, GLint, GLsizei, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1iEXT)(GLuint, GLint, GLint) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1ivEXT)(GLuint, GLint, GLsizei, const GLint *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1uiEXT)(GLuint, GLint, GLuint) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1uivEXT)(GLuint, GLint, GLsizei, const GLuint *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2fEXT)(GLuint, GLint, GLfloat, GLfloat) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2fvEXT)(GLuint, GLint, GLsizei, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2iEXT)(GLuint, GLint, GLint, GLint) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2ivEXT)(GLuint, GLint, GLsizei, const GLint *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2uiEXT)(GLuint, GLint, GLuint, GLuint) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2uivEXT)(GLuint, GLint, GLsizei, const GLuint *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3fEXT)(GLuint, GLint, GLfloat, GLfloat, GLfloat) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3fvEXT)(GLuint, GLint, GLsizei, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3iEXT)(GLuint, GLint, GLint, GLint, GLint) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3ivEXT)(GLuint, GLint, GLsizei, const GLint *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3uiEXT)(GLuint, GLint, GLuint, GLuint, GLuint) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3uivEXT)(GLuint, GLint, GLsizei, const GLuint *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4fEXT)(GLuint, GLint, GLfloat, GLfloat, GLfloat, GLfloat) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4fvEXT)(GLuint, GLint, GLsizei, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4iEXT)(GLuint, GLint, GLint, GLint, GLint, GLint) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4ivEXT)(GLuint, GLint, GLsizei, const GLint *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4uiEXT)(GLuint, GLint, GLuint, GLuint, GLuint, GLuint) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4uivEXT)(GLuint, GLint, GLsizei, const GLuint *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2x3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2x4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3x2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3x4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4x2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4x3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglUseProgramStagesEXT)(GLuint, GLbitfield, GLuint) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglValidateProgramPipelineEXT)(GLuint) = nullptr;
 
@@ -139,12 +125,8 @@ FLEXTGL_EXPORT void(APIENTRY *flextglTexParameterIivEXT)(GLenum, GLenum, const G
 FLEXTGL_EXPORT void(APIENTRY *flextglTexParameterIuivEXT)(GLenum, GLenum, const GLuint *) = nullptr;
 
 /* GL_EXT_texture_storage */
-FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage1DEXT)(GLenum, GLsizei, GLenum, GLsizei) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage2DEXT)(GLenum, GLsizei, GLenum, GLsizei, GLsizei) = nullptr;
 FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage3DEXT)(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage1DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage2DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei) = nullptr;
-FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage3DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei) = nullptr;
 
 /* GL_KHR_blend_equation_advanced */
 FLEXTGL_EXPORT void(APIENTRY *flextglBlendBarrierKHR)(void) = nullptr;
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGL.h b/src/MagnumExternal/OpenGL/GLES2/flextGL.h
index 606c85332..aaefc5153 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGL.h
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGL.h
@@ -1347,10 +1347,6 @@ GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1iEXT)(GLuint, GLint, G
 #define glProgramUniform1iEXT flextglProgramUniform1iEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1ivEXT)(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform1ivEXT flextglProgramUniform1ivEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1uiEXT)(GLuint, GLint, GLuint);
-#define glProgramUniform1uiEXT flextglProgramUniform1uiEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform1uivEXT)(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform1uivEXT flextglProgramUniform1uivEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2fEXT)(GLuint, GLint, GLfloat, GLfloat);
 #define glProgramUniform2fEXT flextglProgramUniform2fEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2fvEXT)(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1359,10 +1355,6 @@ GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2iEXT)(GLuint, GLint, G
 #define glProgramUniform2iEXT flextglProgramUniform2iEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2ivEXT)(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform2ivEXT flextglProgramUniform2ivEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2uiEXT)(GLuint, GLint, GLuint, GLuint);
-#define glProgramUniform2uiEXT flextglProgramUniform2uiEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform2uivEXT)(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform2uivEXT flextglProgramUniform2uivEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3fEXT)(GLuint, GLint, GLfloat, GLfloat, GLfloat);
 #define glProgramUniform3fEXT flextglProgramUniform3fEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3fvEXT)(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1371,10 +1363,6 @@ GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3iEXT)(GLuint, GLint, G
 #define glProgramUniform3iEXT flextglProgramUniform3iEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3ivEXT)(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform3ivEXT flextglProgramUniform3ivEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3uiEXT)(GLuint, GLint, GLuint, GLuint, GLuint);
-#define glProgramUniform3uiEXT flextglProgramUniform3uiEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform3uivEXT)(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform3uivEXT flextglProgramUniform3uivEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4fEXT)(GLuint, GLint, GLfloat, GLfloat, GLfloat, GLfloat);
 #define glProgramUniform4fEXT flextglProgramUniform4fEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4fvEXT)(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1383,28 +1371,12 @@ GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4iEXT)(GLuint, GLint, G
 #define glProgramUniform4iEXT flextglProgramUniform4iEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4ivEXT)(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform4ivEXT flextglProgramUniform4ivEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4uiEXT)(GLuint, GLint, GLuint, GLuint, GLuint, GLuint);
-#define glProgramUniform4uiEXT flextglProgramUniform4uiEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniform4uivEXT)(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform4uivEXT flextglProgramUniform4uivEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix2fvEXT flextglProgramUniformMatrix2fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2x3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix2x3fvEXT flextglProgramUniformMatrix2x3fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix2x4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix2x4fvEXT flextglProgramUniformMatrix2x4fvEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix3fvEXT flextglProgramUniformMatrix3fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3x2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix3x2fvEXT flextglProgramUniformMatrix3x2fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix3x4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix3x4fvEXT flextglProgramUniformMatrix3x4fvEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix4fvEXT flextglProgramUniformMatrix4fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4x2fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix4x2fvEXT flextglProgramUniformMatrix4x2fvEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglProgramUniformMatrix4x3fvEXT)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix4x3fvEXT flextglProgramUniformMatrix4x3fvEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglUseProgramStagesEXT)(GLuint, GLbitfield, GLuint);
 #define glUseProgramStagesEXT flextglUseProgramStagesEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglValidateProgramPipelineEXT)(GLuint);
@@ -1431,18 +1403,10 @@ GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTexParameterIuivEXT)(GLenum, GLenum,
 
 /* GL_EXT_texture_storage */
 
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage1DEXT)(GLenum, GLsizei, GLenum, GLsizei);
-#define glTexStorage1DEXT flextglTexStorage1DEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage2DEXT)(GLenum, GLsizei, GLenum, GLsizei, GLsizei);
 #define glTexStorage2DEXT flextglTexStorage2DEXT
 GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTexStorage3DEXT)(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei);
 #define glTexStorage3DEXT flextglTexStorage3DEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage1DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei);
-#define glTextureStorage1DEXT flextglTextureStorage1DEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage2DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei);
-#define glTextureStorage2DEXT flextglTextureStorage2DEXT
-GLAPI FLEXTGL_EXPORT void(APIENTRY *flextglTextureStorage3DEXT)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei);
-#define glTextureStorage3DEXT flextglTextureStorage3DEXT
 
 /* GL_KHR_blend_equation_advanced */
 
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h b/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
index 6f447311a..abae35d93 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
@@ -1554,10 +1554,6 @@ GL_APICALL void GL_APIENTRY GLES2ProgramUniform1iEXT(GLuint, GLint, GLint);
 #define glProgramUniform1iEXT GLES2ProgramUniform1iEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform1ivEXT(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform1ivEXT GLES2ProgramUniform1ivEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform1uiEXT(GLuint, GLint, GLuint);
-#define glProgramUniform1uiEXT GLES2ProgramUniform1uiEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform1uivEXT(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform1uivEXT GLES2ProgramUniform1uivEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform2fEXT(GLuint, GLint, GLfloat, GLfloat);
 #define glProgramUniform2fEXT GLES2ProgramUniform2fEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform2fvEXT(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1566,10 +1562,6 @@ GL_APICALL void GL_APIENTRY GLES2ProgramUniform2iEXT(GLuint, GLint, GLint, GLint
 #define glProgramUniform2iEXT GLES2ProgramUniform2iEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform2ivEXT(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform2ivEXT GLES2ProgramUniform2ivEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform2uiEXT(GLuint, GLint, GLuint, GLuint);
-#define glProgramUniform2uiEXT GLES2ProgramUniform2uiEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform2uivEXT(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform2uivEXT GLES2ProgramUniform2uivEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform3fEXT(GLuint, GLint, GLfloat, GLfloat, GLfloat);
 #define glProgramUniform3fEXT GLES2ProgramUniform3fEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform3fvEXT(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1578,10 +1570,6 @@ GL_APICALL void GL_APIENTRY GLES2ProgramUniform3iEXT(GLuint, GLint, GLint, GLint
 #define glProgramUniform3iEXT GLES2ProgramUniform3iEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform3ivEXT(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform3ivEXT GLES2ProgramUniform3ivEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform3uiEXT(GLuint, GLint, GLuint, GLuint, GLuint);
-#define glProgramUniform3uiEXT GLES2ProgramUniform3uiEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform3uivEXT(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform3uivEXT GLES2ProgramUniform3uivEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform4fEXT(GLuint, GLint, GLfloat, GLfloat, GLfloat, GLfloat);
 #define glProgramUniform4fEXT GLES2ProgramUniform4fEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform4fvEXT(GLuint, GLint, GLsizei, const GLfloat *);
@@ -1590,28 +1578,12 @@ GL_APICALL void GL_APIENTRY GLES2ProgramUniform4iEXT(GLuint, GLint, GLint, GLint
 #define glProgramUniform4iEXT GLES2ProgramUniform4iEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniform4ivEXT(GLuint, GLint, GLsizei, const GLint *);
 #define glProgramUniform4ivEXT GLES2ProgramUniform4ivEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform4uiEXT(GLuint, GLint, GLuint, GLuint, GLuint, GLuint);
-#define glProgramUniform4uiEXT GLES2ProgramUniform4uiEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniform4uivEXT(GLuint, GLint, GLsizei, const GLuint *);
-#define glProgramUniform4uivEXT GLES2ProgramUniform4uivEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix2fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix2fvEXT GLES2ProgramUniformMatrix2fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix2x3fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix2x3fvEXT GLES2ProgramUniformMatrix2x3fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix2x4fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix2x4fvEXT GLES2ProgramUniformMatrix2x4fvEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix3fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix3fvEXT GLES2ProgramUniformMatrix3fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix3x2fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix3x2fvEXT GLES2ProgramUniformMatrix3x2fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix3x4fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix3x4fvEXT GLES2ProgramUniformMatrix3x4fvEXT
 GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix4fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
 #define glProgramUniformMatrix4fvEXT GLES2ProgramUniformMatrix4fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix4x2fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix4x2fvEXT GLES2ProgramUniformMatrix4x2fvEXT
-GL_APICALL void GL_APIENTRY GLES2ProgramUniformMatrix4x3fvEXT(GLuint, GLint, GLsizei, GLboolean, const GLfloat *);
-#define glProgramUniformMatrix4x3fvEXT GLES2ProgramUniformMatrix4x3fvEXT
 GL_APICALL void GL_APIENTRY GLES2UseProgramStagesEXT(GLuint, GLbitfield, GLuint);
 #define glUseProgramStagesEXT GLES2UseProgramStagesEXT
 GL_APICALL void GL_APIENTRY GLES2ValidateProgramPipelineEXT(GLuint);
@@ -1682,8 +1654,6 @@ GL_APICALL void GL_APIENTRY GLES2TexParameterIuivEXT(GLenum, GLenum, const GLuin
 /* GL_EXT_texture_storage */
 #ifndef GL_EXT_texture_storage
 #define GL_EXT_texture_storage 1
-GL_APICALL void GL_APIENTRY GLES2TexStorage1DEXT(GLenum, GLsizei, GLenum, GLsizei);
-#define glTexStorage1DEXT GLES2TexStorage1DEXT
 GL_APICALL void GL_APIENTRY GLES2TexStorage2DEXT(GLenum, GLsizei, GLenum, GLsizei, GLsizei);
 #define glTexStorage2DEXT GLES2TexStorage2DEXT
 GL_APICALL void GL_APIENTRY GLES2TexStorage3DEXT(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei);
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatform.cpp b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatform.cpp
index d7df7679f..0bc5c6371 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatform.cpp
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatform.cpp
@@ -100,35 +100,21 @@ void flextGLInit() {
     flextglProgramUniform1fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(loader.load("glProgramUniform1fvEXT"));
     flextglProgramUniform1iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint)>(loader.load("glProgramUniform1iEXT"));
     flextglProgramUniform1ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(loader.load("glProgramUniform1ivEXT"));
-    flextglProgramUniform1uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint)>(loader.load("glProgramUniform1uiEXT"));
-    flextglProgramUniform1uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(loader.load("glProgramUniform1uivEXT"));
     flextglProgramUniform2fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat)>(loader.load("glProgramUniform2fEXT"));
     flextglProgramUniform2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(loader.load("glProgramUniform2fvEXT"));
     flextglProgramUniform2iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint)>(loader.load("glProgramUniform2iEXT"));
     flextglProgramUniform2ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(loader.load("glProgramUniform2ivEXT"));
-    flextglProgramUniform2uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint)>(loader.load("glProgramUniform2uiEXT"));
-    flextglProgramUniform2uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(loader.load("glProgramUniform2uivEXT"));
     flextglProgramUniform3fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat, GLfloat)>(loader.load("glProgramUniform3fEXT"));
     flextglProgramUniform3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(loader.load("glProgramUniform3fvEXT"));
     flextglProgramUniform3iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint, GLint)>(loader.load("glProgramUniform3iEXT"));
     flextglProgramUniform3ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(loader.load("glProgramUniform3ivEXT"));
-    flextglProgramUniform3uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint, GLuint)>(loader.load("glProgramUniform3uiEXT"));
-    flextglProgramUniform3uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(loader.load("glProgramUniform3uivEXT"));
     flextglProgramUniform4fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat, GLfloat, GLfloat)>(loader.load("glProgramUniform4fEXT"));
     flextglProgramUniform4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(loader.load("glProgramUniform4fvEXT"));
     flextglProgramUniform4iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint, GLint, GLint)>(loader.load("glProgramUniform4iEXT"));
     flextglProgramUniform4ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(loader.load("glProgramUniform4ivEXT"));
-    flextglProgramUniform4uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint, GLuint, GLuint)>(loader.load("glProgramUniform4uiEXT"));
-    flextglProgramUniform4uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(loader.load("glProgramUniform4uivEXT"));
     flextglProgramUniformMatrix2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix2fvEXT"));
-    flextglProgramUniformMatrix2x3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix2x3fvEXT"));
-    flextglProgramUniformMatrix2x4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix2x4fvEXT"));
     flextglProgramUniformMatrix3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix3fvEXT"));
-    flextglProgramUniformMatrix3x2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix3x2fvEXT"));
-    flextglProgramUniformMatrix3x4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix3x4fvEXT"));
     flextglProgramUniformMatrix4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix4fvEXT"));
-    flextglProgramUniformMatrix4x2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix4x2fvEXT"));
-    flextglProgramUniformMatrix4x3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(loader.load("glProgramUniformMatrix4x3fvEXT"));
     flextglUseProgramStagesEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLbitfield, GLuint)>(loader.load("glUseProgramStagesEXT"));
     flextglValidateProgramPipelineEXT = reinterpret_cast<void(APIENTRY*)(GLuint)>(loader.load("glValidateProgramPipelineEXT"));
 
@@ -143,12 +129,8 @@ void flextGLInit() {
     flextglTexParameterIuivEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLenum, const GLuint *)>(loader.load("glTexParameterIuivEXT"));
 
     /* GL_EXT_texture_storage */
-    flextglTexStorage1DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei)>(loader.load("glTexStorage1DEXT"));
     flextglTexStorage2DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei, GLsizei)>(loader.load("glTexStorage2DEXT"));
     flextglTexStorage3DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei)>(loader.load("glTexStorage3DEXT"));
-    flextglTextureStorage1DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei)>(loader.load("glTextureStorage1DEXT"));
-    flextglTextureStorage2DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei)>(loader.load("glTextureStorage2DEXT"));
-    flextglTextureStorage3DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei)>(loader.load("glTextureStorage3DEXT"));
 
     /* GL_KHR_blend_equation_advanced */
     flextglBlendBarrierKHR = reinterpret_cast<void(APIENTRY*)(void)>(loader.load("glBlendBarrierKHR"));
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp
index d94dd06d4..1c99e7def 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp
@@ -59,35 +59,21 @@
 #undef glProgramUniform1fvEXT
 #undef glProgramUniform1iEXT
 #undef glProgramUniform1ivEXT
-#undef glProgramUniform1uiEXT
-#undef glProgramUniform1uivEXT
 #undef glProgramUniform2fEXT
 #undef glProgramUniform2fvEXT
 #undef glProgramUniform2iEXT
 #undef glProgramUniform2ivEXT
-#undef glProgramUniform2uiEXT
-#undef glProgramUniform2uivEXT
 #undef glProgramUniform3fEXT
 #undef glProgramUniform3fvEXT
 #undef glProgramUniform3iEXT
 #undef glProgramUniform3ivEXT
-#undef glProgramUniform3uiEXT
-#undef glProgramUniform3uivEXT
 #undef glProgramUniform4fEXT
 #undef glProgramUniform4fvEXT
 #undef glProgramUniform4iEXT
 #undef glProgramUniform4ivEXT
-#undef glProgramUniform4uiEXT
-#undef glProgramUniform4uivEXT
 #undef glProgramUniformMatrix2fvEXT
-#undef glProgramUniformMatrix2x3fvEXT
-#undef glProgramUniformMatrix2x4fvEXT
 #undef glProgramUniformMatrix3fvEXT
-#undef glProgramUniformMatrix3x2fvEXT
-#undef glProgramUniformMatrix3x4fvEXT
 #undef glProgramUniformMatrix4fvEXT
-#undef glProgramUniformMatrix4x2fvEXT
-#undef glProgramUniformMatrix4x3fvEXT
 #undef glUseProgramStagesEXT
 #undef glValidateProgramPipelineEXT
 #undef glGetSamplerParameterIivEXT
@@ -98,12 +84,8 @@
 #undef glSamplerParameterIuivEXT
 #undef glTexParameterIivEXT
 #undef glTexParameterIuivEXT
-#undef glTexStorage1DEXT
 #undef glTexStorage2DEXT
 #undef glTexStorage3DEXT
-#undef glTextureStorage1DEXT
-#undef glTextureStorage2DEXT
-#undef glTextureStorage3DEXT
 #undef glBlendBarrierKHR
 #undef glDebugMessageCallbackKHR
 #undef glDebugMessageControlKHR
@@ -146,6 +128,9 @@
 #include <ES2/glext.h>
 
 void flextGLInit() {
+    /* Work around missing glTexStorage3D (can't be used anyway because GLES2
+       on iOS doesn't support OES_texture_3D) */
+    constexpr void(*glTexStorage3DEXT)() = nullptr;
 
     /* GL_ANGLE_framebuffer_blit */
     #if GL_ANGLE_framebuffer_blit
@@ -272,35 +257,21 @@ void flextGLInit() {
     flextglProgramUniform1fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(glProgramUniform1fvEXT);
     flextglProgramUniform1iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint)>(glProgramUniform1iEXT);
     flextglProgramUniform1ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(glProgramUniform1ivEXT);
-    flextglProgramUniform1uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint)>(glProgramUniform1uiEXT);
-    flextglProgramUniform1uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(glProgramUniform1uivEXT);
     flextglProgramUniform2fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat)>(glProgramUniform2fEXT);
     flextglProgramUniform2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(glProgramUniform2fvEXT);
     flextglProgramUniform2iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint)>(glProgramUniform2iEXT);
     flextglProgramUniform2ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(glProgramUniform2ivEXT);
-    flextglProgramUniform2uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint)>(glProgramUniform2uiEXT);
-    flextglProgramUniform2uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(glProgramUniform2uivEXT);
     flextglProgramUniform3fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat, GLfloat)>(glProgramUniform3fEXT);
     flextglProgramUniform3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(glProgramUniform3fvEXT);
     flextglProgramUniform3iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint, GLint)>(glProgramUniform3iEXT);
     flextglProgramUniform3ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(glProgramUniform3ivEXT);
-    flextglProgramUniform3uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint, GLuint)>(glProgramUniform3uiEXT);
-    flextglProgramUniform3uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(glProgramUniform3uivEXT);
     flextglProgramUniform4fEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLfloat, GLfloat, GLfloat, GLfloat)>(glProgramUniform4fEXT);
     flextglProgramUniform4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLfloat *)>(glProgramUniform4fvEXT);
     flextglProgramUniform4iEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLint, GLint, GLint, GLint)>(glProgramUniform4iEXT);
     flextglProgramUniform4ivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLint *)>(glProgramUniform4ivEXT);
-    flextglProgramUniform4uiEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLuint, GLuint, GLuint, GLuint)>(glProgramUniform4uiEXT);
-    flextglProgramUniform4uivEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, const GLuint *)>(glProgramUniform4uivEXT);
     flextglProgramUniformMatrix2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix2fvEXT);
-    flextglProgramUniformMatrix2x3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix2x3fvEXT);
-    flextglProgramUniformMatrix2x4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix2x4fvEXT);
     flextglProgramUniformMatrix3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix3fvEXT);
-    flextglProgramUniformMatrix3x2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix3x2fvEXT);
-    flextglProgramUniformMatrix3x4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix3x4fvEXT);
     flextglProgramUniformMatrix4fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix4fvEXT);
-    flextglProgramUniformMatrix4x2fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix4x2fvEXT);
-    flextglProgramUniformMatrix4x3fvEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLint, GLsizei, GLboolean, const GLfloat *)>(glProgramUniformMatrix4x3fvEXT);
     flextglUseProgramStagesEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLbitfield, GLuint)>(glUseProgramStagesEXT);
     flextglValidateProgramPipelineEXT = reinterpret_cast<void(APIENTRY*)(GLuint)>(glValidateProgramPipelineEXT);
     #endif
@@ -319,12 +290,8 @@ void flextGLInit() {
 
     /* GL_EXT_texture_storage */
     #if GL_EXT_texture_storage
-    flextglTexStorage1DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei)>(glTexStorage1DEXT);
     flextglTexStorage2DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei, GLsizei)>(glTexStorage2DEXT);
     flextglTexStorage3DEXT = reinterpret_cast<void(APIENTRY*)(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei)>(glTexStorage3DEXT);
-    flextglTextureStorage1DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei)>(glTextureStorage1DEXT);
-    flextglTextureStorage2DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei)>(glTextureStorage2DEXT);
-    flextglTextureStorage3DEXT = reinterpret_cast<void(APIENTRY*)(GLuint, GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei)>(glTextureStorage3DEXT);
     #endif
 
     /* GL_KHR_blend_equation_advanced */
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp.template b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp.template
index 2d5982016..a038a4f0a 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp.template
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGLPlatformIOS.cpp.template
@@ -12,6 +12,9 @@
 #include <ES2/glext.h>
 
 void flextGLInit() {
+    /* Work around missing glTexStorage3D (can't be used anyway because GLES2
+       on iOS doesn't support OES_texture_3D) */
+    constexpr void(*glTexStorage3DEXT)() = nullptr;
     @for category,funcs in functions:
     @if funcs and category not in ['ES_VERSION_2_0']: