diff --git a/source/_integrations/universal.markdown b/source/_integrations/universal.markdown
index 0cc899d7494..a74f58b05ab 100644
--- a/source/_integrations/universal.markdown
+++ b/source/_integrations/universal.markdown
@@ -58,6 +58,7 @@ media_player:
       is_volume_muted: ENTITY_ID|ATTRIBUTE
       state: ENTITY_ID|ATTRIBUTE
     device_class: tv
+    unique_id: a_unique_string
 ```
 
 {% configuration %}
@@ -85,6 +86,10 @@ device_class:
   description: The device class that this entity represents. Can be `tv`, `speaker`, or `receiver`.
   required: false
   type: string
+unique_id:
+  description: A unique identifier for this entity. Needs to be unique within the `media_player` platform.
+  required: false
+  type: string
 {% endconfiguration %}
 
 The Universal Media Player will primarily imitate one of its `children`. The Universal Media Player will control the first child on the list that is active (not idle/off). The Universal Media Player will also inherit its state from the first active child if a `state_template` is not provided. Entities in the `children:` list must be media players, but the state template can contain any entity.
@@ -305,6 +310,7 @@ media_player:
         data:
           activity: "{{ source }}"
     device_class: tv
+    unique_id: media_room_harmony_hub
 ```
 
 {% endraw %}