diff --git a/homeassistant/components/cast/media_player.py b/homeassistant/components/cast/media_player.py
index 9aec9a47ea2..3b63dd91ca9 100644
--- a/homeassistant/components/cast/media_player.py
+++ b/homeassistant/components/cast/media_player.py
@@ -140,7 +140,7 @@ async def async_setup_platform(
 
 async def async_setup_entry(hass, config_entry, async_add_entities):
     """Set up Cast from a config entry."""
-    config = hass.data[CAST_DOMAIN].get("media_player", {})
+    config = hass.data[CAST_DOMAIN].get("media_player") or {}
     if not isinstance(config, list):
         config = [config]