diff --git a/src/Http/Controllers/MasterSupervisorController.php b/src/Http/Controllers/MasterSupervisorController.php
index 8f4b85ed..fdd1f6ca 100644
--- a/src/Http/Controllers/MasterSupervisorController.php
+++ b/src/Http/Controllers/MasterSupervisorController.php
@@ -33,7 +33,7 @@ public function index(MasterSupervisorRepository $masters,
                                 'status' => 'inactive',
                                 'processes' => [],
                                 'options' => [
-                                    'queue' => implode(',', $value['queue'] ?? []),
+                                    'queue' => (array_key_exists('queue', $value) && is_array($value['queue']) ? implode(',', $value['queue']) : $value['queue']) ?? '',
                                     'balance' => $value['balance'] ?? null,
                                 ],
                             ];