diff --git a/src/widgets/dtitlebar.cpp b/src/widgets/dtitlebar.cpp
index 9108ac0d9..f9d2d4d23 100644
--- a/src/widgets/dtitlebar.cpp
+++ b/src/widgets/dtitlebar.cpp
@@ -164,7 +164,7 @@ class DTitlebarPrivate : public DTK_CORE_NAMESPACE::DObjectPrivate
     QAction             *darkThemeAction  = nullptr;
 #endif
 
-    QWindow            *targetWindowHandle = Q_NULLPTR;
+    QPointer<QWindow>            targetWindowHandle;
 
     Qt::WindowFlags     disableFlags;
     bool                mousePressed    = false;