diff --git a/src/Base/Middleware.php b/src/Base/Middleware.php
index 7fcf7db..60cf286 100644
--- a/src/Base/Middleware.php
+++ b/src/Base/Middleware.php
@@ -27,7 +27,7 @@ class Middleware
     public static function set(string $className, string $method, string $middleware): void
     {
         $path = $className . '::' . $method;
-        if (!isset(static::$manager[$path])) {
+        if (!isset(static::$mapping[$path])) {
             static::$mapping[$path] = [];
         }
         if (!in_array($middleware, static::$mapping[$path])) {