diff --git a/effects/minimizeanimation/minimizeanimation.h b/effects/minimizeanimation/minimizeanimation.h
--- a/effects/minimizeanimation/minimizeanimation.h
+++ b/effects/minimizeanimation/minimizeanimation.h
@@ -39,11 +39,11 @@
 
     void reconfigure(ReconfigureFlags flags) override;
 
-    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();
-    virtual bool isActive() const;
+    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;
+    bool isActive() const override;
 
     int requestedEffectChainPosition() const override {
         return 50;