diff --git a/kiri-engine/FileListen/Inotify.php b/kiri-engine/FileListen/Inotify.php
index 7305e6ed..50171de4 100644
--- a/kiri-engine/FileListen/Inotify.php
+++ b/kiri-engine/FileListen/Inotify.php
@@ -34,7 +34,10 @@ class Inotify
     }
 
 
-    public function error()
+    /**
+     * @return void
+     */
+    public function error(): void
     {
 
     }