diff --git a/app/Foundation/Providers/RouteServiceProvider.php b/app/Foundation/Providers/RouteServiceProvider.php
index 17315c4e..8f3f2ede 100644
--- a/app/Foundation/Providers/RouteServiceProvider.php
+++ b/app/Foundation/Providers/RouteServiceProvider.php
@@ -89,6 +89,8 @@ class RouteServiceProvider extends ServiceProvider
         $router->group(['namespace' => $this->namespace, 'as' => 'core::'], function (Router $router) {
             $path = app_path('Http/Routes');
 
+            // GLOB_BRACE is defined as 0, check the source!
+            // https://github.com/php/php-src/blob/31e4afe3c3654f9c5ab2eafa3a02c62d41c58b47/ext/standard/dir.c#L154-L158
             $globBrace = defined('GLOB_BRACE') ? GLOB_BRACE : 0;
             $globFlag = $globBrace;