diff --git a/include/wx/msw/regconf.h b/include/wx/msw/regconf.h
index 3c83e70c98..f9d73d9cae 100644
--- a/include/wx/msw/regconf.h
+++ b/include/wx/msw/regconf.h
@@ -19,7 +19,9 @@
 #ifndef   _REGISTRY_H
   #include "wx/msw/registry.h"
 #endif
+
 #include "wx/object.h"
+#include "wx/confbase.h"
 
 // ----------------------------------------------------------------------------
 // wxRegConfig