diff --git a/src/MenuLinkNormalizer.php b/src/MenuLinkNormalizer.php
index 6a44a10..36f5a44 100644
--- a/src/MenuLinkNormalizer.php
+++ b/src/MenuLinkNormalizer.php
@@ -33,7 +33,7 @@ class MenuLinkNormalizer extends ContentEntityNormalizer {
    */
   public function normalize($entity, $format = NULL, array $context = array()) {
     $normalized = parent::normalize($entity, $format, $context);
-    if (is_array($normalized['link'])) {
+    if (isset($normalized['link']) && is_array($normalized['link'])) {
       foreach($normalized['link'] as $key => $link) {
         $node_id = $this->getNidFromUri($link['uri']);
         if ($node_id) {
@@ -49,22 +49,13 @@ class MenuLinkNormalizer extends ContentEntityNormalizer {
    * {@inheritdoc}
    */
   public function denormalize($data, $class, $format = NULL, array $context = array()) {
-    if (is_array($data['link'])) {
+    if (isset($data['link']) && is_array($data['link'])) {
       foreach($data['link'] as $key => $link) {
-        if (!isset($link['_uuid'])) {
-          continue;
-        }
-
-        $node = $this->entityManager->loadEntityByUuid(
-          'node',
-          $link['_uuid']
-        );
         $node_id = $this->getNidFromUri($link['uri']);
-        $data['link'][$key]['uri'] = str_replace(
-          $node_id,
-          $node->id(),
-          $link['uri']
-        );
+        if ($node_id && isset($link['_uuid'])) {
+          $node = $this->entityManager->loadEntityByUuid('node', $link['_uuid']);
+          $data['link'][$key]['uri'] = str_replace($node_id, $node->id(), $link['uri']);
+        }
       }
     }
     $entity = parent::denormalize($data, $class, $format, $context);