diff --git a/examples/qtquick/customtitlebar/main.cpp b/examples/qtquick/customtitlebar/main.cpp
index f3bbacc4..96f14fdf 100644
--- a/examples/qtquick/customtitlebar/main.cpp
+++ b/examples/qtquick/customtitlebar/main.cpp
@@ -21,12 +21,17 @@
 class CustomFrameworkWidgetFactory : public KDDockWidgets::DefaultWidgetFactory
 {
 public:
+
+    ~CustomFrameworkWidgetFactory() override;
+
     QUrl titleBarFilename() const override
     {
         return QUrl("qrc:/MyTitleBar.qml");
     }
 };
 
+CustomFrameworkWidgetFactory::~CustomFrameworkWidgetFactory() = default;
+
 int main(int argc, char *argv[])
 {
 #ifdef Q_OS_WIN