diff --git a/src/controls/QskSwitchButton.h b/src/controls/QskSwitchButton.h
index 994569a9..ad23c0a8 100644
--- a/src/controls/QskSwitchButton.h
+++ b/src/controls/QskSwitchButton.h
@@ -24,7 +24,7 @@ class QSK_EXPORT QskSwitchButton : public QskAbstractButton
 
     ~QskSwitchButton() override;
 
-    bool isCheckable() const final;
+    bool isCheckable() const override final;
 
     Qt::Orientation orientation() const;
     void setOrientation(Qt::Orientation);