diff --git a/platform/qt/dmxwidget/dmxwidget.h b/platform/qt/dmxwidget/dmxwidget.h
index a7b9474..7d562f8 100644
--- a/platform/qt/dmxwidget/dmxwidget.h
+++ b/platform/qt/dmxwidget/dmxwidget.h
@@ -69,7 +69,7 @@ signals:
     void serialDataRead();
 
 protected:
-    void sendMessage(std::shared_ptr<ENTTEC::Pro::MessageData>) const override;
+    virtual void sendMessage(std::shared_ptr<ENTTEC::Pro::MessageData>) const override;
 
 private:
     QSerialPort *port_;