diff --git a/src/Routing/Middleware/RoutingMiddleware.php b/src/Routing/Middleware/RoutingMiddleware.php
index c4d1db88b58..3149a906995 100644
--- a/src/Routing/Middleware/RoutingMiddleware.php
+++ b/src/Routing/Middleware/RoutingMiddleware.php
@@ -89,9 +89,9 @@ protected function buildRouteCollection()
     {
         $isRouterCacheEnabled = Configure::read('Router.cache');
         if (Cache::enabled() && $isRouterCacheEnabled) {
-            $routesCacheConfig = Configure::read('Router.cacheConfig', self::DEFAULT_ROUTER_CACHE_CONFIG);
+            $routesCacheConfig = Configure::read('Router.cacheConfig', static::DEFAULT_ROUTER_CACHE_CONFIG);
 
-            return Cache::remember(self::ROUTE_COLLECTION_CACHE_KEY, function () {
+            return Cache::remember(static::ROUTE_COLLECTION_CACHE_KEY, function () {
 
                 return $this->prepareRouteCollection();
             }, $routesCacheConfig);