diff --git a/src/msw/dialog.cpp b/src/msw/dialog.cpp
index d5a9b74930..1f57be36a8 100644
--- a/src/msw/dialog.cpp
+++ b/src/msw/dialog.cpp
@@ -33,6 +33,7 @@
     #include "wx/utils.h"
     #include "wx/frame.h"
     #include "wx/app.h"
+    #include "wx/button.h"
     #include "wx/settings.h"
     #include "wx/intl.h"
     #include "wx/log.h"