diff --git a/HttpServer/Events/OnWorkerStart.php b/HttpServer/Events/OnWorkerStart.php
index 35bc81f6..a867ac88 100644
--- a/HttpServer/Events/OnWorkerStart.php
+++ b/HttpServer/Events/OnWorkerStart.php
@@ -57,6 +57,9 @@ class OnWorkerStart extends Callback
 				return;
 			}
 			while (true) {
+				if (!isset(Coroutine::getContext(Coroutine::getPcid())['isComplete'])) {
+					break;
+				}
 				$content = Coroutine::getContext(Coroutine::getPcid())['isComplete'];
 				if ($content === true) {
 					break;