2 files changed, 3 insertions, 2 deletions
diff --git a/examples/widgets/widgets/sliders/window.cpp b/examples/widgets/widgets/sliders/window.cpp
index 16b60dde49..16467e71be 100644
--- a/examples/widgets/widgets/sliders/window.cpp
+++ b/examples/widgets/widgets/sliders/window.cpp
@@ -54,7 +54,8 @@
 #include "window.h"
 
 //! [0]
-Window::Window()
+Window::Window(QWidget *parent)
+    : QWidget(parent)
 {
     horizontalSliders = new SlidersGroup(Qt::Horizontal, tr("Horizontal"));
     verticalSliders = new SlidersGroup(Qt::Vertical, tr("Vertical"));
diff --git a/examples/widgets/widgets/sliders/window.h b/examples/widgets/widgets/sliders/window.h
index 9c4c14fa37..4894781ac2 100644
--- a/examples/widgets/widgets/sliders/window.h
+++ b/examples/widgets/widgets/sliders/window.h
@@ -69,7 +69,7 @@ class Window : public QWidget
     Q_OBJECT
 
 public:
-    Window();
+    Window(QWidget *parent = nullptr);
 
 private:
     void createControls(const QString &title);