1 files changed, 4 insertions, 4 deletions
diff --git a/examples/widgets/tools/undo/document.h b/examples/widgets/tools/undo/document.h
index 4f362a9597..9246c9320d 100644
--- a/examples/widgets/tools/undo/document.h
+++ b/examples/widgets/tools/undo/document.h
@@ -101,10 +101,10 @@ signals:
     void currentShapeChanged(const QString &shapeName);
 
 protected:
-    void paintEvent(QPaintEvent *event);
-    void mousePressEvent(QMouseEvent *event);
-    void mouseReleaseEvent(QMouseEvent *event);
-    void mouseMoveEvent(QMouseEvent *event);
+    void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
+    void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 
 private:
     void setCurrentShape(int index);