diff --git a/gfx/glsym/glsym_gl.h b/gfx/glsym/glsym_gl.h
index 86d25f2cf7..e950f8ec4c 100644
--- a/gfx/glsym/glsym_gl.h
+++ b/gfx/glsym/glsym_gl.h
@@ -24,6 +24,7 @@ typedef GLint GLfixed;
 #if defined(OSX) && !defined(MAC_OS_X_VERSION_10_7)
 typedef long long int GLint64;
 typedef unsigned long long int GLuint64;
+typedef unsigned long long int GLuint64EXT;
 typedef struct __GLsync *GLsync;
 #endif
 typedef void (APIENTRYP RGLSYMGLDRAWRANGEELEMENTSPROC) (GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const void *indices);