diff --git a/include/wx/univ/toplevel.h b/include/wx/univ/toplevel.h
index a02df18726..4a15051a46 100644
--- a/include/wx/univ/toplevel.h
+++ b/include/wx/univ/toplevel.h
@@ -17,6 +17,7 @@
 
 #include "wx/univ/inpcons.h"
 #include "wx/univ/inphand.h"
+#include "wx/icon.h"
 
 // ----------------------------------------------------------------------------
 // constants