diff --git a/include/GLFW/glfw3.h b/include/GLFW/glfw3.h
index 04ba52ce..9503dd0d 100644
--- a/include/GLFW/glfw3.h
+++ b/include/GLFW/glfw3.h
@@ -190,6 +190,9 @@ extern "C" {
  #else /*__APPLE__*/
 
   #include <GL/glcorearb.h>
+  #if defined(GLFW_INCLUDE_GLEXT)
+   #include <GL/glext.h>
+  #endif
 
  #endif /*__APPLE__*/