diff --git a/panda/src/display/graphicsWindowProcCallbackData.h b/panda/src/display/graphicsWindowProcCallbackData.h
index 810d9e2fb6..e247b0943d 100644
--- a/panda/src/display/graphicsWindowProcCallbackData.h
+++ b/panda/src/display/graphicsWindowProcCallbackData.h
@@ -17,9 +17,10 @@
 
 #include "pandabase.h"
 #include "callbackData.h"
-#include "graphicsWindow.h"
 #include "touchInfo.h"
 
+class GraphicsWindow;
+
 ////////////////////////////////////////////////////////////////////
 //       Class : GraphicsWindowProcCallbackData
 // Description : This specialization on CallbackData is passed when