diff --git a/config/horizon.php b/config/horizon.php
index e2a05b44..62b41264 100644
--- a/config/horizon.php
+++ b/config/horizon.php
@@ -69,7 +69,7 @@ return [
 
     'prefix' => env(
         'HORIZON_PREFIX',
-        Str::slug(env('APP_NAME', 'laravel'), '_') . '_horizon:'
+        Str::slug(env('APP_NAME', 'laravel'), '_').'_horizon:'
     ),
 
     /*