diff --git a/src/osx/cocoa/msgdlg.mm b/src/osx/cocoa/msgdlg.mm
index 189d0166b3..73075caaa7 100644
--- a/src/osx/cocoa/msgdlg.mm
+++ b/src/osx/cocoa/msgdlg.mm
@@ -18,6 +18,7 @@
     #include "wx/app.h"
 #endif
 
+#include "wx/control.h"
 #include "wx/thread.h"
 #include "wx/osx/private.h"