diff --git a/homeassistant/components/media_player/cast.py b/homeassistant/components/media_player/cast.py
index 6b012fe6fbd..4039c95c7fc 100644
--- a/homeassistant/components/media_player/cast.py
+++ b/homeassistant/components/media_player/cast.py
@@ -56,8 +56,8 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
         hosts = [(config[CONF_HOST], DEFAULT_PORT)]
 
     else:
-        hosts = [host for host in pychromecast.discover_chromecasts()
-                 if host not in KNOWN_HOSTS]
+        hosts = [tuple(dev[:2]) for dev in pychromecast.discover_chromecasts()
+                 if tuple(dev[:2]) not in KNOWN_HOSTS]
 
     casts = []