diff --git a/include/wx/msw/setup0.h b/include/wx/msw/setup0.h
index f861cf4d20..4cc5ca36c2 100644
--- a/include/wx/msw/setup0.h
+++ b/include/wx/msw/setup0.h
@@ -751,6 +751,9 @@
 
 #undef wxUSE_MS_HTML_HELP
 #define wxUSE_MS_HTML_HELP 0
+
+#undef wxUSE_WCHAR_T
+#define wxUSE_WCHAR_T 0
 #endif
 
 #if defined(__WXMSW__) && !defined(__WIN32__)