diff --git a/samples/ribbon/ribbondemo.cpp b/samples/ribbon/ribbondemo.cpp
index ffd13589ef..65a3b95b2f 100644
--- a/samples/ribbon/ribbondemo.cpp
+++ b/samples/ribbon/ribbondemo.cpp
@@ -24,6 +24,7 @@
 #include "wx/ribbon/toolbar.h"
 #include "wx/sizer.h"
 #include "wx/menu.h"
+#include "wx/msgdlg.h"
 #include "wx/dcbuffer.h"
 #include "wx/colordlg.h"
 #include "wx/artprov.h"