diff --git a/source/_integrations/history_stats.markdown b/source/_integrations/history_stats.markdown
index cf8c3fff578..a04ef6ec84c 100644
--- a/source/_integrations/history_stats.markdown
+++ b/source/_integrations/history_stats.markdown
@@ -48,6 +48,10 @@ entity_id:
   description: The entity you want to track.
   required: true
   type: string
+unique_id:
+  description: An ID that uniquely identifies this entity. Set this to a unique value to allow customization through the UI.
+  required: false
+  type: string
 state:
   description: The states you want to track.
   required: true