diff --git a/include/SDL_config_macosx.h b/include/SDL_config_macosx.h
index 018eac030..295b87245 100644
--- a/include/SDL_config_macosx.h
+++ b/include/SDL_config_macosx.h
@@ -136,6 +136,7 @@
 
 /* Enable OpenGL support */
 #define SDL_VIDEO_OPENGL	1
+#define SDL_VIDEO_OPENGL_GLX 1
 
 /* Disable screensaver */
 #define SDL_VIDEO_DISABLE_SCREENSAVER	1