diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 32c52d2fe2..a00eeaa5e9 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1648,6 +1648,8 @@ void QGuiApplicationPrivate::processApplicationStateChangedEvent(QWindowSystemIn
         QEvent appDeactivate(QEvent::ApplicationDeactivate);
         qApp->sendSpontaneousEvent(qApp, &appDeactivate);
         break; }
+    default:
+        break;
     }
 }