diff --git a/libkwineffects/kwinanimationeffect.h b/libkwineffects/kwinanimationeffect.h
--- a/libkwineffects/kwinanimationeffect.h
+++ b/libkwineffects/kwinanimationeffect.h
@@ -148,9 +148,8 @@
      * If you shadow _windowClosed() or connect your slot to EffectsHandler::windowClosed() after _windowClosed() was connected, animations for closing windows will fail.
      */
     AnimationEffect();
-    ~AnimationEffect();
+    ~AnimationEffect() override;
 
-    bool isActive() const;
     /**
      * Set and get predefined metatypes.
      * The first 24 bits are reserved for the AnimationEffect class - you can use the last 8 bits for custom hints.
@@ -162,11 +161,12 @@
     /**
      * Reimplemented from KWIn::Effect
      */
-    QString debug(const QString &parameter) const;
-    virtual void prePaintScreen( ScreenPrePaintData& data, int time );
-    virtual void prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time );
-    virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
-    virtual void postPaintScreen();
+    bool isActive() const override;
+    QString debug(const QString &parameter) const override;
+    void prePaintScreen(ScreenPrePaintData &data, int time) override;
+    void prePaintWindow(EffectWindow *w, WindowPrePaintData &data, int time) override;
+    void paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data) override;
+    void postPaintScreen() override;
 
     /**
      * Gaussian (bumper) animation curve for QEasingCurve