diff --git a/core/modules/rest/src/Routing/ResourceRoutes.php b/core/modules/rest/src/Routing/ResourceRoutes.php
index 7f53d1f..7793257 100644
--- a/core/modules/rest/src/Routing/ResourceRoutes.php
+++ b/core/modules/rest/src/Routing/ResourceRoutes.php
@@ -68,7 +68,7 @@ public function __construct(ResourcePluginManager $manager, ConfigFactoryInterfa
   protected function alterRoutes(RouteCollection $collection) {
     $routes = array();
     $resources = $this->config->get('rest.settings')->get('resources') ?: array();
-    $enabled_resources = array_intersect_key($this->manager->getDefinitions(), $resources);
+    $enabled_resources = array_intersect_key($resources, $this->manager->getDefinitions());
     // Iterate over all enabled resource plugins.
     foreach ($enabled_resources as $id => $enabled_methods) {
       $plugin = $this->manager->getInstance(array('id' => $id));