diff --git a/hikvision-doorbell/src/doorbell.py b/hikvision-doorbell/src/doorbell.py
index 1710f8b..5dab9e6 100644
--- a/hikvision-doorbell/src/doorbell.py
+++ b/hikvision-doorbell/src/doorbell.py
@@ -384,7 +384,7 @@ def mute_audio_output(self):
                 logger.debug("Current talk volume found: {}", talkVolume)
 
             currentVolume = current_settings.find('.//{*}volume')
-            if currentVolume is None or currentVolume.text is None or "0":
+            if currentVolume is None or currentVolume.text is None or currentVolume.text is "0":
                 self._previouse_audio_out_volume = 7
                 logger.debug("Current volume not found, using 7 as default")
             else: