diff --git a/src/Frontend/FrontendServiceProvider.php b/src/Frontend/FrontendServiceProvider.php
index 52c04c9d0..8cd55cac2 100644
--- a/src/Frontend/FrontendServiceProvider.php
+++ b/src/Frontend/FrontendServiceProvider.php
@@ -61,7 +61,7 @@ class FrontendServiceProvider extends AbstractServiceProvider
         });
 
         $this->container->singleton('flarum.frontend.document', function (Container $container) {
-            return function (array $apiDocument, Request $request) use ($container){
+            return function (array $apiDocument, Request $request) use ($container) {
                 return new Document(
                     $container->make(Factory::class),
                     $apiDocument,