diff --git a/include/GL/gl.h b/include/GL/gl.h
index 108f8a8..23bd32b 100644
--- a/include/GL/gl.h
+++ b/include/GL/gl.h
@@ -49,22 +49,10 @@ __BEGIN_DECLS
 
 /* Stencil actions */
 #define GL_KEEP             0x1E00
-#define GL_ZERO             0x0000
-#define GL_REPLACE          0x1E01
 #define GL_INCR             0x1E02
 #define GL_DECR             0x1E03
 #define GL_INVERT           0x150A
 
-/* Stencil comparison functions */
-#define GL_NEVER            0x0200
-#define GL_ALWAYS           0x0207
-#define GL_LESS             0x0201
-#define GL_LEQUAL           0x0203
-#define GL_EQUAL            0x0202
-#define GL_GEQUAL           0x0206
-#define GL_GREATER          0x0204
-#define GL_NOTEQUAL         0x0205
-
 /* Matrix modes */
 #define GL_MATRIX_MODE      0x0BA0
 #define GL_MODELVIEW        0x1700