diff --git a/homeassistant/components/media_player/sonos.py b/homeassistant/components/media_player/sonos.py
index 5fc0166aefa..29ed4b9b90a 100644
--- a/homeassistant/components/media_player/sonos.py
+++ b/homeassistant/components/media_player/sonos.py
@@ -62,6 +62,11 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
     if discovery_info:
         player = soco.SoCo(discovery_info)
+
+        # if device allready exists by config
+        if player.uid in DEVICES:
+            return True
+
         if player.is_visible:
             device = SonosDevice(hass, player)
             add_devices([device])
@@ -212,6 +217,11 @@ class SonosDevice(MediaPlayerDevice):
         """Update state, called by track_utc_time_change."""
         self.update_ha_state(True)
 
+    @property
+    def unique_id(self):
+        """Return an unique ID."""
+        return self._player.uid
+
     @property
     def name(self):
         """Return the name of the device."""
diff --git a/tests/components/media_player/test_sonos.py b/tests/components/media_player/test_sonos.py
index 33b5afcd1ae..add1f0c3ce5 100644
--- a/tests/components/media_player/test_sonos.py
+++ b/tests/components/media_player/test_sonos.py
@@ -67,6 +67,10 @@ class SoCoMock():
         """Cause the speaker to separate itself from other speakers."""
         return
 
+    def uid(self):
+        """Return a player uid."""
+        return "RINCON_XXXXXXXXXXXXXXXXX"
+
 
 class TestSonosMediaPlayer(unittest.TestCase):
     """Test the media_player module."""