diff --git a/Servers/WindowServer/WSClientConnection.h b/Servers/WindowServer/WSClientConnection.h
index 1138a94550..9fae7bfccc 100644
--- a/Servers/WindowServer/WSClientConnection.h
+++ b/Servers/WindowServer/WSClientConnection.h
@@ -7,6 +7,7 @@
 #include <LibCore/CObject.h>
 #include <LibCore/CoreIPCServer.h>
 #include <LibDraw/GraphicsBitmap.h>
+#include <WindowServer/WSAPITypes.h>
 #include <WindowServer/WSEvent.h>
 
 class WSWindow;
@@ -35,7 +36,6 @@ public:
     void notify_about_new_screen_rect(const Rect&);
     void post_paint_message(WSWindow&);
 
-
 private:
     virtual void event(CEvent&) override;