diff --git a/plugins/dde-dock/sound/soundcontroller.h b/plugins/dde-dock/sound/soundcontroller.h
index f312c21e4..5590a1ac6 100644
--- a/plugins/dde-dock/sound/soundcontroller.h
+++ b/plugins/dde-dock/sound/soundcontroller.h
@@ -47,7 +47,7 @@ class SoundController final : public QObject, public Dtk::Core::DSingleton<Sound
 
 private:
     DBusAudio *m_audioInter;
-    DBusSink *m_defaultSinkInter;
+    QPointer<DBusSink> m_defaultSinkInter;
     QSharedPointer<DConfig> m_dconfig;
 };