diff --git a/include/wx/effects.h b/include/wx/effects.h
index 1ad96f4ec6..c36a9fe833 100644
--- a/include/wx/effects.h
+++ b/include/wx/effects.h
@@ -19,6 +19,7 @@
 
 #include "wx/object.h"
 #include "wx/colour.h"
+#include "wx/gdicmn.h"
 
 class WXDLLEXPORT wxEffects: public wxObject
 {