diff --git a/headers/private/interface/WindowPrivate.h b/headers/private/interface/WindowPrivate.h
index 6c0a80e3dc..e0a7fdc724 100644
--- a/headers/private/interface/WindowPrivate.h
+++ b/headers/private/interface/WindowPrivate.h
@@ -7,6 +7,8 @@
 #ifndef _WINDOW_PRIVATE_H
 #define _WINDOW_PRIVATE_H
 
+#include <Window.h>
+
 /* Private window looks */
 
 const window_look kDesktopWindowLook = window_look(4);