diff --git a/src/native/common/extgl.h b/src/native/common/extgl.h
index c3ea3b43..aedafa58 100644
--- a/src/native/common/extgl.h
+++ b/src/native/common/extgl.h
@@ -107,6 +107,23 @@ extern "C" {
 
 /* OpenGL 1.1 definition */
 
+#ifdef _MACOSX
+typedef unsigned long GLenum;
+typedef unsigned char GLboolean;
+typedef unsigned long GLbitfield;
+typedef signed char GLbyte;
+typedef short GLshort;
+typedef long GLint;
+typedef long GLsizei;
+typedef unsigned char GLubyte;
+typedef unsigned short GLushort;
+typedef unsigned long GLuint;
+typedef float GLfloat;
+typedef float GLclampf;
+typedef double GLdouble;
+typedef double GLclampd;
+typedef void GLvoid;
+#else
 typedef unsigned int GLenum;
 typedef unsigned char GLboolean;
 typedef unsigned int GLbitfield;
@@ -122,6 +139,7 @@ typedef float GLclampf;
 typedef double GLdouble;
 typedef double GLclampd;
 typedef void GLvoid;
+#endif
 
 // OpenGL 2.0 types
 typedef int GLintptr;