diff --git a/effects/minimizeanimation/minimizeanimation.h b/effects/minimizeanimation/minimizeanimation.h
--- a/effects/minimizeanimation/minimizeanimation.h
+++ b/effects/minimizeanimation/minimizeanimation.h
@@ -51,10 +51,10 @@
 
     static bool supported();
 
-public Q_SLOTS:
-    void slotWindowDeleted(KWin::EffectWindow *w);
-    void slotWindowMinimized(KWin::EffectWindow *w);
-    void slotWindowUnminimized(KWin::EffectWindow *w);
+private Q_SLOTS:
+    void windowDeleted(EffectWindow *w);
+    void windowMinimized(EffectWindow *w);
+    void windowUnminimized(EffectWindow *w);
 
 private:
     QHash< EffectWindow*, QTimeLine* > mTimeLineWindows;
diff --git a/effects/minimizeanimation/minimizeanimation.cpp b/effects/minimizeanimation/minimizeanimation.cpp
--- a/effects/minimizeanimation/minimizeanimation.cpp
+++ b/effects/minimizeanimation/minimizeanimation.cpp
@@ -28,9 +28,9 @@
 MinimizeAnimationEffect::MinimizeAnimationEffect()
 {
     mActiveAnimations = 0;
-    connect(effects, SIGNAL(windowDeleted(KWin::EffectWindow*)), this, SLOT(slotWindowDeleted(KWin::EffectWindow*)));
-    connect(effects, SIGNAL(windowMinimized(KWin::EffectWindow*)), this, SLOT(slotWindowMinimized(KWin::EffectWindow*)));
-    connect(effects, SIGNAL(windowUnminimized(KWin::EffectWindow*)), this, SLOT(slotWindowUnminimized(KWin::EffectWindow*)));
+    connect(effects, &EffectsHandler::windowDeleted, this, &MinimizeAnimationEffect::windowDeleted);
+    connect(effects, &EffectsHandler::windowMinimized, this, &MinimizeAnimationEffect::windowMinimized);
+    connect(effects, &EffectsHandler::windowUnminimized, this, &MinimizeAnimationEffect::windowUnminimized);
 }
 
 bool MinimizeAnimationEffect::supported()
@@ -116,12 +116,12 @@
     effects->postPaintScreen();
 }
 
-void MinimizeAnimationEffect::slotWindowDeleted(EffectWindow* w)
+void MinimizeAnimationEffect::windowDeleted(EffectWindow *w)
 {
     delete mTimeLineWindows.take(w);
 }
 
-void MinimizeAnimationEffect::slotWindowMinimized(EffectWindow* w)
+void MinimizeAnimationEffect::windowMinimized(EffectWindow *w)
 {
     if (effects->activeFullScreenEffect())
         return;
@@ -134,7 +134,7 @@
     }
 }
 
-void MinimizeAnimationEffect::slotWindowUnminimized(EffectWindow* w)
+void MinimizeAnimationEffect::windowUnminimized(EffectWindow *w)
 {
     if (effects->activeFullScreenEffect())
         return;