diff --git a/libkwineffects/kwinglutils_funcs.cpp b/libkwineffects/kwinglutils_funcs.cpp
index 13dc17509e..65585b1709 100644
--- a/libkwineffects/kwinglutils_funcs.cpp
+++ b/libkwineffects/kwinglutils_funcs.cpp
@@ -251,6 +251,10 @@ glMapBuffer_func         glMapBuffer;
 glUnmapBuffer_func       glUnmapBuffer;
 glGetBufferPointerv_func glGetBufferPointerv;
 
+// GL_EXT_map_buffer_range
+glMapBufferRange_func         glMapBufferRange;
+glFlushMappedBufferRange_func glFlushMappedBufferRange;
+
 #endif // KWIN_HAVE_OPENGLES
 
 #ifdef KWIN_HAVE_EGL
@@ -676,6 +680,15 @@ void glResolveFunctions(OpenGLPlatformInterface platformInterface)
         glGetBufferPointerv = NULL;
     }
 
+    if (hasGLExtension("GL_EXT_map_buffer_range")) {
+        // See http://www.khronos.org/registry/gles/extensions/EXT/EXT_map_buffer_range.txt
+        glMapBufferRange         = (glMapBufferRange_func)         eglGetProcAddress("glMapBufferRangeEXT");
+        glFlushMappedBufferRange = (glFlushMappedBufferRange_func) eglGetProcAddress("glFlushMappedBufferRangeEXT");
+    } else {
+        glMapBufferRange         = NULL;
+        glFlushMappedBufferRange = NULL;
+    }
+
 #endif // KWIN_HAVE_OPENGLES
 
 #ifdef KWIN_HAVE_EGL
diff --git a/libkwineffects/kwinglutils_funcs.h b/libkwineffects/kwinglutils_funcs.h
index 02d7da8510..5b306be64c 100644
--- a/libkwineffects/kwinglutils_funcs.h
+++ b/libkwineffects/kwinglutils_funcs.h
@@ -493,10 +493,21 @@ extern KWIN_EXPORT glFlushMappedBufferRange_func glFlushMappedBufferRange;
 #define EGL_OPENGL_ES3_BIT_KHR                              0x00000040
 #endif
 
+#ifndef __gl3_h_
+#define GL_MAP_READ_BIT                   0x0001
+#define GL_MAP_WRITE_BIT                  0x0002
+#define GL_MAP_INVALIDATE_RANGE_BIT       0x0004
+#define GL_MAP_INVALIDATE_BUFFER_BIT      0x0008
+#define GL_MAP_FLUSH_EXPLICIT_BIT         0x0010
+#define GL_MAP_UNSYNCHRONIZED_BIT         0x0020
+#endif
+
 namespace KWin
 {
 
 void KWIN_EXPORT eglResolveFunctions();
+void KWIN_EXPORT glResolveFunctions(OpenGLPlatformInterface platformInterface);
+
 // EGL
 typedef EGLImageKHR(*eglCreateImageKHR_func)(EGLDisplay, EGLContext, EGLenum, EGLClientBuffer, const EGLint*);
 typedef EGLBoolean(*eglDestroyImageKHR_func)(EGLDisplay, EGLImageKHR);
@@ -521,6 +532,13 @@ extern KWIN_EXPORT glMapBuffer_func         glMapBuffer;
 extern KWIN_EXPORT glUnmapBuffer_func       glUnmapBuffer;
 extern KWIN_EXPORT glGetBufferPointerv_func glGetBufferPointerv;
 
+// GL_EXT_map_buffer_range
+typedef GLvoid *(*glMapBufferRange_func)(GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access);
+typedef void (*glFlushMappedBufferRange_func)(GLenum target, GLintptr offset, GLsizeiptr length);
+
+extern KWIN_EXPORT glMapBufferRange_func         glMapBufferRange;
+extern KWIN_EXPORT glFlushMappedBufferRange_func glFlushMappedBufferRange;
+
 #endif // KWIN_HAVE_OPENGLES
 
 } // namespace