diff --git a/plugins/dde-dock/sound/soundapplet.cpp b/plugins/dde-dock/sound/soundapplet.cpp
index 5c7711cb2..6b9f57227 100644
--- a/plugins/dde-dock/sound/soundapplet.cpp
+++ b/plugins/dde-dock/sound/soundapplet.cpp
@@ -319,7 +319,7 @@ void SoundApplet::enableDevice(bool flag)
 void SoundApplet::removeDisabledDevice(QString portName, unsigned int cardId)
 {
     removePort(SoundCardPort::compositeKey(cardId, portName));
-    if (m_defSinkInter->activePort().name == portName && m_defSinkInter->card() == cardId) {
+    if (m_defSinkInter && m_defSinkInter->activePort().name == portName && m_defSinkInter->card() == cardId) {
         enableDevice(false);
     }
 }