diff --git a/include/wx/msw/regconf.h b/include/wx/msw/regconf.h
index 5ed19b74e1..6c19bf5845 100644
--- a/include/wx/msw/regconf.h
+++ b/include/wx/msw/regconf.h
@@ -19,6 +19,7 @@
 #ifndef   _REGISTRY_H
   #include <wx/msw/registry.h>
 #endif
+#include <wx/object.h>
 
 // ----------------------------------------------------------------------------
 // wxRegConfig