diff --git a/interface/wx/vidmode.h b/interface/wx/vidmode.h
index c4120ef91d..5a683fb097 100644
--- a/interface/wx/vidmode.h
+++ b/interface/wx/vidmode.h
@@ -86,5 +86,5 @@ public:
 /**
     A global wxVideoMode instance used by wxDisplay.
 */
-wxVideoMode wxDefaultVideoMode;
+const wxVideoMode wxDefaultVideoMode;