diff --git a/docs/en/UI/Angular/List-Service.md b/docs/en/UI/Angular/List-Service.md
index fc3697bd35..2f0eb9fc57 100644
--- a/docs/en/UI/Angular/List-Service.md
+++ b/docs/en/UI/Angular/List-Service.md
@@ -201,3 +201,4 @@ You may use observables in combination with [AsyncPipe](https://angular.io/guide
 
 <input type="text" name="search" [(ngModel)]="list.filter">
 ```
+ABP doesn't have a built-in filtering mechanism. You need to implement yourself and handle `filter` property in backend.