diff --git a/docs/en/Background-Workers.md b/docs/en/Background-Workers.md
index 2e1b9d2a90..ef800108e2 100644
--- a/docs/en/Background-Workers.md
+++ b/docs/en/Background-Workers.md
@@ -45,7 +45,7 @@ Assume that we want to make a user passive, if the user has not logged in to the
 public class PassiveUserCheckerWorker : AsyncPeriodicBackgroundWorkerBase
 {
     public PassiveUserCheckerWorker(
-            AbpTimer timer,
+            AbpAsyncTimer timer,
             IServiceScopeFactory serviceScopeFactory
         ) : base(
             timer, 
@@ -137,4 +137,4 @@ ABP Framework's background worker system is good to implement periodic tasks. Ho
 
 ## See Also
 * [Quartz Integration for the background workers](Background-Workers-Quartz.md) 
-* [Background Jobs](Background-Jobs.md)
\ No newline at end of file
+* [Background Jobs](Background-Jobs.md)