diff --git a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
index 10e0d450b9..674eb3f472 100644
--- a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
+++ b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
@@ -2615,7 +2615,7 @@ void tst_QWindow::activateDeactivateEvent()
         int activateCount = 0;
         int deactivateCount = 0;
     protected:
-        bool event(QEvent *e)
+        bool event(QEvent *e) override
         {
             switch (e->type()) {
             case QEvent::WindowActivate: