diff --git a/src/os/unix/graphics.c b/src/os/unix/graphics.c
index 40c7be0..73e1601 100644
--- a/src/os/unix/graphics.c
+++ b/src/os/unix/graphics.c
@@ -18,8 +18,8 @@
 
 #include <os_dependent.h>
 
+#define GLFW_INCLUDE_GLEXT
 #include <GLFW/glfw3.h>
-//#include <OpenGL/glext.h>
 
 #include <palette.h>