diff --git a/doc/opengl-support.dox b/doc/opengl-support.dox
index 2e90d25e8..cf33b9bb1 100644
--- a/doc/opengl-support.dox
+++ b/doc/opengl-support.dox
@@ -323,6 +323,7 @@ Extension                                   | Status
 @es_extension{NV,shadow_samplers_cube}      | done (shading language only)
 @es_extension{OES,depth24}                  | done
 @es_extension{OES,element_index_uint}       | done
+@es_extension{OES,fbo_render_mipmap}        | done
 @es_extension{OES,rgb8_rgba8}               | done (desktop-compatible subset)
 @es_extension{OES,texture_3D}               | done
 @es_extension2{OES,texture_half_float_linear,OES_texture_float_linear} | done
@@ -427,6 +428,7 @@ Extension                                   | Status
 @webgl_extension{OES,element_index_uint}    | done
 @webgl_extension{OES,texture_float_linear}  | done
 @webgl_extension{OES,texture_half_float_linear} | done
+@webgl_extension{OES,fbo_render_mipmap}     | done
 @webgl_extension{WEBGL,depth_texture}       | done
 @webgl_extension{WEBGL,draw_buffers}        | done
 
diff --git a/src/Magnum/Context.cpp b/src/Magnum/Context.cpp
index b8bf0590e..b922a3991 100644
--- a/src/Magnum/Context.cpp
+++ b/src/Magnum/Context.cpp
@@ -241,6 +241,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,OES,element_index_uint),
         _extension(GL,OES,texture_float_linear),
         _extension(GL,OES,texture_half_float_linear),
+        _extension(GL,OES,fbo_render_mipmap),
         _extension(GL,WEBGL,compressed_texture_s3tc),
         _extension(GL,WEBGL,depth_texture),
         _extension(GL,WEBGL,draw_buffers)};
@@ -355,6 +356,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,NV,shadow_samplers_cube),
         _extension(GL,OES,depth24),
         _extension(GL,OES,element_index_uint),
+        _extension(GL,OES,fbo_render_mipmap),
         _extension(GL,OES,rgb8_rgba8),
         _extension(GL,OES,texture_3D),
         _extension(GL,OES,texture_half_float_linear),
diff --git a/src/Magnum/Extensions.h b/src/Magnum/Extensions.h
index a9ef8042f..c674846c8 100644
--- a/src/Magnum/Extensions.h
+++ b/src/Magnum/Extensions.h
@@ -265,6 +265,7 @@ namespace GL {
         _extension(GL,OES,element_index_uint,       GLES200, GLES300) // #10
         _extension(GL,OES,texture_float_linear,     GLES200, GLES300) // #20
         _extension(GL,OES,texture_half_float_linear, GLES200, GLES300) // #21
+        _extension(GL,OES,fbo_render_mipmap,        GLES200, GLES300) // #28
         #endif
     } namespace WEBGL {
         #ifdef MAGNUM_TARGET_GLES2
@@ -407,6 +408,7 @@ namespace GL {
         _extension(GL,OES,depth32,                  GLES200,    None) // #25
         #ifdef MAGNUM_TARGET_GLES2
         _extension(GL,OES,element_index_uint,       GLES200, GLES300) // #26
+        _extension(GL,OES,fbo_render_mipmap,        GLES200, GLES300) // #27
         #endif
         _extension(GL,OES,mapbuffer,                GLES200,    None) // #29
         #ifdef MAGNUM_TARGET_GLES2
diff --git a/src/Magnum/Framebuffer.h b/src/Magnum/Framebuffer.h
index 196fa63d3..7a0580c0b 100644
--- a/src/Magnum/Framebuffer.h
+++ b/src/Magnum/Framebuffer.h
@@ -621,6 +621,10 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer, public AbstractObje
          *      @fn_gl_extension{NamedFramebufferTexture2D,EXT,direct_state_access},
          *      eventually @fn_gl{BindFramebuffer} and
          *      @fn_gl2{FramebufferTexture2D,FramebufferTexture}
+         * @requires_gles30 Extension @es_extension{OES,fbo_render_mipmap} to
+         *      render to @p level different than `0` in OpenGL ES 2.0.
+         * @requires_webgl20 Extension @webgl_extension{OES,fbo_render_mipmap}
+         *      to render to @p level different than `0` in WebGL 1.0.
          */
         Framebuffer& attachTexture(BufferAttachment attachment, Texture2D& texture, Int level);
 
@@ -659,6 +663,10 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer, public AbstractObje
          *      @fn_gl2{NamedFramebufferTextureLayer,FramebufferTextureLayer},
          *      @fn_gl_extension{NamedFramebufferTexture2D,EXT,direct_state_access},
          *      eventually @fn_gl{BindFramebuffer} and @fn_gl2{FramebufferTexture2D,FramebufferTexture}
+         * @requires_gles30 Extension @es_extension{OES,fbo_render_mipmap} to
+         *      render to @p level different than `0` in OpenGL ES 2.0.
+         * @requires_webgl20 Extension @webgl_extension{OES,fbo_render_mipmap}
+         *      to render to @p level different than `0` in WebGL 1.0.
          */
         Framebuffer& attachCubeMapTexture(BufferAttachment attachment, CubeMapTexture& texture, CubeMapCoordinate coordinate, Int level);
 
@@ -682,6 +690,8 @@ class MAGNUM_EXPORT Framebuffer: public AbstractFramebuffer, public AbstractObje
          *      OpenGL ES 2.0
          * @requires_gles30 Extension @es_extension{OES,texture_3D} in OpenGL
          *      ES 2.0.
+         * @requires_gles30 Extension @es_extension{OES,fbo_render_mipmap} to
+         *      render to @p level different than `0` in OpenGL ES 2.0.
          * @requires_webgl20 Only 2D textures are available in WebGL 1.0.
          */
         Framebuffer& attachTextureLayer(BufferAttachment attachment, Texture3D& texture, Int level, Int layer);
diff --git a/src/MagnumExternal/OpenGL/GLES2/Emscripten/extensions.txt b/src/MagnumExternal/OpenGL/GLES2/Emscripten/extensions.txt
index 8a4eb5925..b1a229f11 100644
--- a/src/MagnumExternal/OpenGL/GLES2/Emscripten/extensions.txt
+++ b/src/MagnumExternal/OpenGL/GLES2/Emscripten/extensions.txt
@@ -13,6 +13,7 @@ extension OES_texture_half_float                optional
 extension OES_texture_float                     optional
 extension OES_standard_derivatives              optional
 extension OES_vertex_array_object               optional
+extension OES_fbo_render_mipmap                 optional
 # These are used as a base for WEBGL_* extensions
 extension ANGLE_depth_texture                   optional
 extension EXT_draw_buffers                      optional
diff --git a/src/MagnumExternal/OpenGL/GLES2/extensions.txt b/src/MagnumExternal/OpenGL/GLES2/extensions.txt
index 9abbd3b66..81b986dcb 100644
--- a/src/MagnumExternal/OpenGL/GLES2/extensions.txt
+++ b/src/MagnumExternal/OpenGL/GLES2/extensions.txt
@@ -35,6 +35,7 @@ extension NV_shadow_samplers_array              optional
 extension NV_shadow_samplers_cube               optional
 extension OES_depth24                           optional
 extension OES_element_index_uint                optional
+extension OES_fbo_render_mipmap                 optional
 extension OES_rgb8_rgba8                        optional
 extension OES_texture_3D                        optional
 extension OES_texture_half_float_linear         optional
diff --git a/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h b/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
index bdcf3e2ae..6f447311a 100644
--- a/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
+++ b/src/MagnumExternal/OpenGL/GLES2/flextGLNaCl.h
@@ -1896,6 +1896,11 @@ GL_APICALL void GL_APIENTRY GLES2ReadBufferNV(GLenum);
 #define GL_OES_element_index_uint 1
 #endif
 
+/* GL_OES_fbo_render_mipmap */
+#ifndef GL_OES_fbo_render_mipmap
+#define GL_OES_fbo_render_mipmap 1
+#endif
+
 /* GL_OES_mapbuffer */
 #ifndef GL_OES_mapbuffer
 #define GL_OES_mapbuffer 1