1 files changed, 1 insertions, 1 deletions
diff --git a/examples/widgets/painting/gradients/gradients.h b/examples/widgets/painting/gradients/gradients.h
index c6525d18f8..45ef5d0f93 100644
--- a/examples/widgets/painting/gradients/gradients.h
+++ b/examples/widgets/painting/gradients/gradients.h
@@ -157,7 +157,7 @@ class GradientWidget : public QWidget
     Q_OBJECT
 
 public:
-    GradientWidget(QWidget *parent);
+    GradientWidget(QWidget *parent = nullptr);
 
 public slots:
     void setDefault1() { setDefault(1); }