diff --git a/src/graphic/Fast3D/gfx_opengl.cpp b/src/graphic/Fast3D/gfx_opengl.cpp
index d210d4b3c..31aa162f3 100644
--- a/src/graphic/Fast3D/gfx_opengl.cpp
+++ b/src/graphic/Fast3D/gfx_opengl.cpp
@@ -29,6 +29,7 @@
 #include "SDL_opengl.h"
 #elif __APPLE__
 #include <SDL2/SDL.h>
+#define GL_GLEXT_PROTOTYPES 1
 #include <SDL2/SDL_opengl.h>
 #elif __SWITCH__
 #include <SDL2/SDL.h>