diff --git a/src/Http/Middleware/FlarumPromotionHeader.php b/src/Http/Middleware/FlarumPromotionHeader.php
index 5e809fd0a..773741434 100644
--- a/src/Http/Middleware/FlarumPromotionHeader.php
+++ b/src/Http/Middleware/FlarumPromotionHeader.php
@@ -10,6 +10,7 @@
 namespace Flarum\Http\Middleware;
 
 use Flarum\Foundation\Config;
+use Illuminate\Support\Arr;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Server\MiddlewareInterface as Middleware;
@@ -21,7 +22,7 @@ class FlarumPromotionHeader implements Middleware
 
     public function __construct(Config $config)
     {
-        $this->enabled = $config['poweredByHeader'] ?? true;
+        $this->enabled = Arr::get($config, 'headers.poweredByHeader') ?? true;
     }
 
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface