diff --git a/homeassistant/components/media_player/services.yaml b/homeassistant/components/media_player/services.yaml
index beaea8a8ad083108b870427c873d81ffbfbb4be3..95072f0270c22f9fad0a7c6baa83962587e05bab 100644
--- a/homeassistant/components/media_player/services.yaml
+++ b/homeassistant/components/media_player/services.yaml
@@ -131,8 +131,8 @@ play_media:
       description: The ID of the content to play. Platform dependent.
       example: 'https://home-assistant.io/images/cast/splash.png'
     media_content_type:
-      description: The type of the content to play. Must be one of MUSIC, TVSHOW, VIDEO, EPISODE, CHANNEL or PLAYLIST
-      example: 'MUSIC'
+      description: The type of the content to play. Must be one of music, tvshow, video, episode, channel or playlist
+      example: 'music'
 
 select_source:
   description: Send the media player the command to change input source.