diff --git a/libs/piqt/qpiconnection.h b/libs/piqt/qpiconnection.h
index d1bfc9a..9767692 100644
--- a/libs/piqt/qpiconnection.h
+++ b/libs/piqt/qpiconnection.h
@@ -37,7 +37,7 @@ public:
 	bool loadFromCMFile(const QString & file);
 	
 protected:
-	void propertyChanged(const char *) {setObjectName(PI2QString(name()));}
+	void propertyChanged(const char *) override {setObjectName(PI2QString(name()));}
 	EVENT_HANDLER2(void, piDataRec, const PIString &, from, const PIByteArray &, data);
 	EVENT_HANDLER2(void, piPacketRec, const PIString &, from, const PIByteArray &, data);