diff --git a/Installation/include/CGAL/gl.h b/Installation/include/CGAL/gl.h
index 4f3ae90ef5a..8fad02bb11f 100644
--- a/Installation/include/CGAL/gl.h
+++ b/Installation/include/CGAL/gl.h
@@ -25,6 +25,10 @@
 #  include <wingdi.h>
 #endif
 
-#include <GL/gl.h>
+#ifdef __APPLE__
+#  include <OpenGL/gl.h>
+#else
+#  include <GL/gl.h>
+#endif
 
 #endif // CGAL_GL_H