diff --git a/include/wx/msw/regconf.h b/include/wx/msw/regconf.h
index e9e8dbde43..59fc5c67d2 100644
--- a/include/wx/msw/regconf.h
+++ b/include/wx/msw/regconf.h
@@ -18,7 +18,7 @@
 
 #include "wx/object.h"
 #include "wx/confbase.h"
-#include "buffer.h"
+#include "wx/buffer.h"
 
 // ----------------------------------------------------------------------------
 // wxRegConfig