diff --git a/include/osg/TextureCubeMap b/include/osg/TextureCubeMap
index af51ae0da..566b69c70 100644
--- a/include/osg/TextureCubeMap
+++ b/include/osg/TextureCubeMap
@@ -16,18 +16,6 @@
 
 #include <osg/Texture>
 
-#ifndef GL_TEXTURE_CUBE_MAP
-    #define GL_TEXTURE_CUBE_MAP             0x8513
-    #define GL_TEXTURE_BINDING_CUBE_MAP     0x8514
-    #define GL_TEXTURE_CUBE_MAP_POSITIVE_X  0x8515
-    #define GL_TEXTURE_CUBE_MAP_NEGATIVE_X  0x8516
-    #define GL_TEXTURE_CUBE_MAP_POSITIVE_Y  0x8517
-    #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y  0x8518
-    #define GL_TEXTURE_CUBE_MAP_POSITIVE_Z  0x8519
-    #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z  0x851A
-    #define GL_PROXY_TEXTURE_CUBE_MAP       0x851B
-    #define GL_MAX_CUBE_MAP_TEXTURE_SIZE    0x851C
-#endif
 
 namespace osg {