diff --git a/src/Forum/ForumServiceProvider.php b/src/Forum/ForumServiceProvider.php
index 8e671dbfcd..301cfa320a 100644
--- a/src/Forum/ForumServiceProvider.php
+++ b/src/Forum/ForumServiceProvider.php
@@ -205,7 +205,7 @@ protected function setDefaultRoute(RouteCollection $routes)
         $defaultRoute = $this->container->make('flarum.settings')->get('default_route');
 
         if (isset($routes->getRouteData()[0]['GET'][$defaultRoute]['handler'])) {
-            $toDefaultController = $routes->getRoutes()['GET'][$defaultRoute]['handler'];
+            $toDefaultController = $routes->getRouteData()[0]['GET'][$defaultRoute]['handler'];
         } else {
             $toDefaultController = $factory->toForum(Content\Index::class);
         }