diff --git a/src/waveform/waveformwidgetfactory.h b/src/waveform/waveformwidgetfactory.h
index 17dadc391f31..cc2ec232617e 100644
--- a/src/waveform/waveformwidgetfactory.h
+++ b/src/waveform/waveformwidgetfactory.h
@@ -197,7 +197,7 @@ class WaveformWidgetFactory : public QObject, public Singleton<WaveformWidgetFac
     void setOverviewNormalized(bool normalize);
     int isOverviewNormalized() const { return m_overviewNormalized;}
 
-    const QVector<WaveformWidgetAbstractHandle> getAvailableTypes() const { return m_waveformWidgetHandles;}
+    const QVector<WaveformWidgetAbstractHandle>& getAvailableTypes() const { return m_waveformWidgetHandles;}
     void getAvailableVSyncTypes(QList<QPair<int, QString>>* list);
     void destroyWidgets();