diff --git a/homeassistant/components/media_player/sonos.py b/homeassistant/components/media_player/sonos.py
index ec9bdf34d56..2a12b59e7c7 100644
--- a/homeassistant/components/media_player/sonos.py
+++ b/homeassistant/components/media_player/sonos.py
@@ -896,7 +896,8 @@ class SonosDevice(MediaPlayerDevice):
             self.soco.unjoin()
 
         for slave in slaves:
-            slave.soco.join(self.soco)
+            if slave.unique_id != self.unique_id:
+                slave.soco.join(self.soco)
 
     @soco_error()
     def unjoin(self):