diff --git a/src/msw/toplevel.cpp b/src/msw/toplevel.cpp
index 4a6e8078f7..ba880caae6 100644
--- a/src/msw/toplevel.cpp
+++ b/src/msw/toplevel.cpp
@@ -47,14 +47,6 @@
 
 #include "wx/display.h"
 
-#ifndef ICON_BIG
-    #define ICON_BIG 1
-#endif
-
-#ifndef ICON_SMALL
-    #define ICON_SMALL 0
-#endif
-
 // NB: wxDlgProc must be defined here and not in dialog.cpp because the latter
 //     is not included by wxUniv build which does need wxDlgProc
 LONG APIENTRY