diff --git a/core/modules/rest/src/RequestHandler.php b/core/modules/rest/src/RequestHandler.php
index 6b9884e..51b0088 100644
--- a/core/modules/rest/src/RequestHandler.php
+++ b/core/modules/rest/src/RequestHandler.php
@@ -62,12 +62,12 @@ public function handle(RouteMatchInterface $route_match, Request $request) {
         $class = $definition['serialization_class'];
         // Get context information for deserialization from the plugin
         // definition.
-        $context = array('request_method' => $method);
         if (!empty($definition['serialization_context'])) {
           $context = $definition['serialization_context'];
         }
         // Always add the resource ID to the deserialization context.
         $context['resource_id'] = $plugin;
+        $context['request_method'] = $method;
         try {
           $unserialized = $serializer->deserialize($received, $class, $format, $context);
         }