diff --git a/effects/flipswitch/flipswitch.h b/effects/flipswitch/flipswitch.h
--- a/effects/flipswitch/flipswitch.h
+++ b/effects/flipswitch/flipswitch.h
@@ -86,7 +86,7 @@
 private Q_SLOTS:
     void toggleActiveCurrent();
     void toggleActiveAllDesktops();
-    void globalShortcutChanged(QAction *action, QKeySequence shortcut);
+    void globalShortcutChanged(QAction *action, const QKeySequence &shortcut);
     void slotWindowAdded(KWin::EffectWindow* w);
     void slotWindowClosed(KWin::EffectWindow *w);
     void slotTabBoxAdded(int mode);
diff --git a/effects/flipswitch/flipswitch.cpp b/effects/flipswitch/flipswitch.cpp
--- a/effects/flipswitch/flipswitch.cpp
+++ b/effects/flipswitch/flipswitch.cpp
@@ -805,7 +805,7 @@
 //*************************************************************
 // Keyboard handling
 //*************************************************************
-void FlipSwitchEffect::globalShortcutChanged(QAction *action, QKeySequence shortcut)
+void FlipSwitchEffect::globalShortcutChanged(QAction *action, const QKeySequence &shortcut)
 {
     if (action->objectName() == QStringLiteral("FlipSwitchAll")) {
         m_shortcutAll.clear();