diff --git a/src/Queue/QueueServiceProvider.php b/src/Queue/QueueServiceProvider.php
index aad14bb49..90bbf0785 100644
--- a/src/Queue/QueueServiceProvider.php
+++ b/src/Queue/QueueServiceProvider.php
@@ -36,7 +36,9 @@ class QueueServiceProvider extends AbstractServiceProvider
 
     public function register()
     {
-        define('ARTISAN_BINARY', 'flarum');
+        if (! defined('ARTISAN_BINARY')) {
+            define('ARTISAN_BINARY', 'flarum');
+        }
 
         // Register a simple connection factory that always returns the same
         // connection, as that is enough for our purposes.