diff --git a/libs/surfaces/control_protocol/control_protocol/control_protocol.h b/libs/surfaces/control_protocol/control_protocol/control_protocol.h
index 4d219c0c34..bd8f13ddd0 100644
--- a/libs/surfaces/control_protocol/control_protocol/control_protocol.h
+++ b/libs/surfaces/control_protocol/control_protocol/control_protocol.h
@@ -89,10 +89,10 @@ public:
 	void remove_stripable_from_selection (boost::shared_ptr<ARDOUR::Stripable>);
 	void clear_stripable_selection ();
 
-	void add_rid_to_selection (int rid);
-	void set_rid_selection (int rid);
-	void toggle_rid_selection (int rid);
-	void remove_rid_from_selection (int rid);
+	virtual void add_rid_to_selection (int rid);
+	virtual void set_rid_selection (int rid);
+	virtual void toggle_rid_selection (int rid);
+	virtual void remove_rid_from_selection (int rid);
 
 	boost::shared_ptr<ARDOUR::Stripable> first_selected_stripable () const;