--- src/VBox/GuestHost/OpenGL/include/GL/glext.h.orig	2013-03-02 23:09:10.000000000 -0600
+++ src/VBox/GuestHost/OpenGL/include/GL/glext.h	2013-03-02 23:11:01.000000000 -0600
@@ -3718,8 +3718,8 @@
 
 #ifndef GL_ARB_vertex_buffer_object
 /* GL types for handling large vertex buffer objects */
-typedef ptrdiff_t GLintptrARB;
-typedef ptrdiff_t GLsizeiptrARB;
+typedef long GLintptrARB;
+typedef long GLsizeiptrARB;
 #endif
 
 /* VBox: HACK ALERT! When building the host side against Mac OS X 10.7 headers,