diff --git a/src/MagnumExternal/OpenGL/GLES3/Emscripten/flextGLEmscripten.h.template b/src/MagnumExternal/OpenGL/GLES3/Emscripten/flextGLEmscripten.h.template
index 9d20bf954..602425683 100644
--- a/src/MagnumExternal/OpenGL/GLES3/Emscripten/flextGLEmscripten.h.template
+++ b/src/MagnumExternal/OpenGL/GLES3/Emscripten/flextGLEmscripten.h.template
@@ -31,7 +31,7 @@
 
 /* Defensive include guards */
 
-#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_)
+#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_) || defined(__gl32_h_)
 #error Attempt to include auto-generated header after including gl3.h
 #endif
 #if defined(__gl2ext_h_) || defined(__gl3ext_h_)
diff --git a/src/MagnumExternal/OpenGL/GLES3/flextGL.h b/src/MagnumExternal/OpenGL/GLES3/flextGL.h
index 3c75a8bc6..2646beb90 100644
--- a/src/MagnumExternal/OpenGL/GLES3/flextGL.h
+++ b/src/MagnumExternal/OpenGL/GLES3/flextGL.h
@@ -33,7 +33,7 @@
 
 /* Defensive include guards */
 
-#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_)
+#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_) || defined(__gl32_h_)
 #error Attempt to include auto-generated header after including gl3.h
 #endif
 #if defined(__gl2ext_h_) || defined(__gl3ext_h_)
diff --git a/src/MagnumExternal/OpenGL/GLES3/flextGL.h.template b/src/MagnumExternal/OpenGL/GLES3/flextGL.h.template
index b01d24f8f..3a3b7e090 100644
--- a/src/MagnumExternal/OpenGL/GLES3/flextGL.h.template
+++ b/src/MagnumExternal/OpenGL/GLES3/flextGL.h.template
@@ -34,7 +34,7 @@
 
 /* Defensive include guards */
 
-#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_)
+#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_) || defined(__gl32_h_)
 #error Attempt to include auto-generated header after including gl3.h
 #endif
 #if defined(__gl2ext_h_) || defined(__gl3ext_h_)
diff --git a/src/MagnumExternal/OpenGL/GLES3/flextGLEmscripten.h b/src/MagnumExternal/OpenGL/GLES3/flextGLEmscripten.h
index ad53d152e..ca10170ca 100644
--- a/src/MagnumExternal/OpenGL/GLES3/flextGLEmscripten.h
+++ b/src/MagnumExternal/OpenGL/GLES3/flextGLEmscripten.h
@@ -30,7 +30,7 @@
 
 /* Defensive include guards */
 
-#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_)
+#if defined(__gl_h_) || defined(__gl2_h_) || defined(__gl3_h_) || defined(__gl31_h_) || defined(__gl32_h_)
 #error Attempt to include auto-generated header after including gl3.h
 #endif
 #if defined(__gl2ext_h_) || defined(__gl3ext_h_)