diff --git a/include/wx/osx/radiobox.h b/include/wx/osx/radiobox.h
index d12539f343..3b4aedb265 100644
--- a/include/wx/osx/radiobox.h
+++ b/include/wx/osx/radiobox.h
@@ -11,6 +11,8 @@
 #ifndef _WX_RADIOBOX_H_
 #define _WX_RADIOBOX_H_
 
+#include "wx/containr.h"
+
 // List box item
 class WXDLLIMPEXP_FWD_CORE wxBitmap ;