2 files changed, 3 insertions, 2 deletions
diff --git a/examples/widgets/widgets/windowflags/controllerwindow.cpp b/examples/widgets/widgets/windowflags/controllerwindow.cpp
index 78323810ed..c19f23c513 100644
--- a/examples/widgets/widgets/windowflags/controllerwindow.cpp
+++ b/examples/widgets/widgets/windowflags/controllerwindow.cpp
@@ -53,7 +53,8 @@
 #include "controllerwindow.h"
 
 //! [0]
-ControllerWindow::ControllerWindow()
+ControllerWindow::ControllerWindow(QWidget *parent)
+    : QWidget(parent)
 {
     previewWindow = new PreviewWindow(this);
 
diff --git a/examples/widgets/widgets/windowflags/controllerwindow.h b/examples/widgets/widgets/windowflags/controllerwindow.h
index cfb88ed20f..43ec67e27f 100644
--- a/examples/widgets/widgets/windowflags/controllerwindow.h
+++ b/examples/widgets/widgets/windowflags/controllerwindow.h
@@ -69,7 +69,7 @@ class ControllerWindow : public QWidget
     Q_OBJECT
 
 public:
-    ControllerWindow();
+    ControllerWindow(QWidget *parent = nullptr);
 
 private slots:
     void updatePreview();