diff --git a/src/Illuminate/Queue/Console/RetryCommand.php b/src/Illuminate/Queue/Console/RetryCommand.php
index df8271725bfc..a3436a61b908 100644
--- a/src/Illuminate/Queue/Console/RetryCommand.php
+++ b/src/Illuminate/Queue/Console/RetryCommand.php
@@ -51,7 +51,7 @@ public function fire()
      */
     protected function getJobIds()
     {
-        $ids = $this->argument('id');
+        $ids = (array) $this->argument('id');
 
         if (count($ids) === 1 && $ids[0] === 'all') {
             $ids = Arr::pluck($this->laravel['queue.failer']->all(), 'id');