diff --git a/include/wx/chkconf.h b/include/wx/chkconf.h
index cd32106010..ebf1ede895 100644
--- a/include/wx/chkconf.h
+++ b/include/wx/chkconf.h
@@ -38,16 +38,6 @@
 #   define wxUSE_GUI 1
 #endif /* !defined(wxUSE_GUI) */
 
-/* wxBase doesn't need compatibility settings as it's a new port */
-#if !wxUSE_GUI
-#   undef WXWIN_COMPATIBILITY
-#   undef WXWIN_COMPATIBILITY_2
-#   undef WXWIN_COMPATIBILITY_2_2
-#   define WXWIN_COMPATIBILITY 0
-#   define WXWIN_COMPATIBILITY_2 0
-#   define WXWIN_COMPATIBILITY_2_2 0
-#endif /* !wxUSE_GUI */
-
 /*
    tests for non GUI features
  */