diff --git a/include/wx/cocoa/glcanvas.h b/include/wx/cocoa/glcanvas.h
index fdbecd935c..18b8a5fd75 100644
--- a/include/wx/cocoa/glcanvas.h
+++ b/include/wx/cocoa/glcanvas.h
@@ -12,6 +12,8 @@
 #ifndef _WX_COCOA_GLCANVAS_H__
 #define _WX_COCOA_GLCANVAS_H__
 
+#include "wx/window.h"
+
 // #include "wx/cocoa/NSOpenGLView.h"
 // Include gl.h from the OpenGL framework
 #include <OpenGL/gl.h>