diff --git a/Utils/JobQueue/JobQueue.php b/Utils/JobQueue/JobQueue.php
index 0ac7b16d0..bbb5df5b7 100644
--- a/Utils/JobQueue/JobQueue.php
+++ b/Utils/JobQueue/JobQueue.php
@@ -91,12 +91,7 @@ class JobQueue
         fclose(STDOUT);
         fclose(STDERR);
 
-        function shutdown()
-        {
-            posix_kill(posix_getpid(), SIGHUP);
-        }
-
-        register_shutdown_function('shutdown');
+        register_shutdown_function(function() { posix_kill(posix_getpid(), SIGHUP); });
     }
 
     public function setRunning(bool $run = true) /* : void */