diff --git a/include/wx/validate.h b/include/wx/validate.h
index 0adf3bf477..2a67766dbc 100644
--- a/include/wx/validate.h
+++ b/include/wx/validate.h
@@ -104,7 +104,8 @@ extern WXDLLIMPEXP_DATA_CORE(const wxValidator) wxDefaultValidator;
     // a wxValidator parameter to avoid using "#if wxUSE_VALIDATORS"
     // everywhere
     class WXDLLIMPEXP_FWD_CORE wxValidator;
-    #define wxDefaultValidator (*reinterpret_cast<wxValidator*>(NULL))
+    static const wxValidator* wxDefaultValidatorPtr = NULL;
+    #define wxDefaultValidator (*wxDefaultValidatorPtr)
 
     // this macro allows to avoid warnings about unused parameters when
     // wxUSE_VALIDATORS == 0