diff --git a/custom_components/smartthings_soundbar/media_player.py b/custom_components/smartthings_soundbar/media_player.py
index 05b2a7a..19707f3 100644
--- a/custom_components/smartthings_soundbar/media_player.py
+++ b/custom_components/smartthings_soundbar/media_player.py
@@ -67,6 +67,7 @@ def __init__(self, name, api_key, device_id, max_volume):
     def update(self):
         SoundbarApi.device_update(self)
 
+    @property
     def unique_id(self) -> str | None:
         return f"SmartThings_Soundbar_{self._device_id}"