diff --git a/kiri-engine/Coordinator.php b/kiri-engine/Coordinator.php
index ca285fd5..91ac2add 100644
--- a/kiri-engine/Coordinator.php
+++ b/kiri-engine/Coordinator.php
@@ -17,10 +17,9 @@ class Coordinator
 	 */
 	public function yield(): void
 	{
-		if ($this->waite === false) {
-			return;
-		}
-		$this->yield();
+		while ($this->waite) {
+            usleep(1000);
+        }
 	}