diff --git a/source/_lovelace/entity-filter.markdown b/source/_lovelace/entity-filter.markdown
index 488c32f59a2..cc35db50635 100644
--- a/source/_lovelace/entity-filter.markdown
+++ b/source/_lovelace/entity-filter.markdown
@@ -84,7 +84,7 @@ value:
   type: string
 operator:
   required: false
-  description: Operator to use in the comparison.
+  description: Operator to use in the comparison. Can be `==`, `<=`, `<`, `>=`, `>`, `!=` or `regex`.
   type: string
 attribute:
   required: false