diff --git a/http-server/Worker/OnWorkerStart.php b/http-server/Worker/OnWorkerStart.php
index 14b4b0ea..990886ee 100644
--- a/http-server/Worker/OnWorkerStart.php
+++ b/http-server/Worker/OnWorkerStart.php
@@ -30,7 +30,7 @@ class OnWorkerStart extends WorkerStart implements EventDispatcherInterface
         $time = microtime(true);
 
         ServerManager::setEnv('environmental', Kiri::WORKER);
-        if (!is_enable_file_modification_listening()) {
+        if (is_enable_file_modification_listening()) {
             $this->router->read_files();
             $this->interpretDirectory();
         }