diff --git a/homeassistant/components/media_player/yamaha.py b/homeassistant/components/media_player/yamaha.py
index f102d8a490d31e..0b74aaae7db41f 100644
--- a/homeassistant/components/media_player/yamaha.py
+++ b/homeassistant/components/media_player/yamaha.py
@@ -149,6 +149,11 @@ def __init__(self, name, receiver, source_ignore,
         self._name = name
         self._zone = receiver.zone
 
+    @property
+    def unique_id(self):
+        """Return an unique ID."""
+        return '{0}:{1}'.format(self.receiver.ctrl_url, self._zone)
+        
     def update(self):
         """Get the latest details from the device."""
         self._play_status = self.receiver.play_status()