diff --git a/HttpServer/Events/OnWorkerStart.php b/HttpServer/Events/OnWorkerStart.php
index 7a0bb3b5..6cbe0e5f 100644
--- a/HttpServer/Events/OnWorkerStart.php
+++ b/HttpServer/Events/OnWorkerStart.php
@@ -68,7 +68,9 @@ class OnWorkerStart extends Callback
     {
         $this->debug(sprintf(workerName($worker_id) . ' #%d is start.....', $worker_id));
         Coroutine\go(function (Server $server, $worker_id) {
-            Coroutine::waitSignal($this->signal);
+            if (!Coroutine::waitSignal($this->signal)) {
+                return 0;
+            }
             while (Snowflake::app()->isRun()) {
                 Coroutine::sleep(1);
             }