diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index f649e7773e..633b8e12e9 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -577,7 +577,7 @@ class Worker
 				// How long is the process already running?
 				$duration = (time() - strtotime($entry["executed"])) / 60;
 				if ($duration > $max_duration) {
-					logger("Worker process ".$entry["pid"]." (".implode(" ", $argv).") took more than ".$max_duration." minutes. It will be killed now.");
+					logger("Worker process ".$entry["pid"]." (".substr(json_encode($argv), 0, 50).") took more than ".$max_duration." minutes. It will be killed now.");
 					posix_kill($entry["pid"], SIGTERM);
 
 					// We killed the stale process.