diff --git a/core/modules/hal/lib/Drupal/hal/Normalizer/EntityCollectionNormalizer.php b/core/modules/hal/lib/Drupal/hal/Normalizer/EntityCollectionNormalizer.php
index 4d8de85..7f06eb4 100644
--- a/core/modules/hal/lib/Drupal/hal/Normalizer/EntityCollectionNormalizer.php
+++ b/core/modules/hal/lib/Drupal/hal/Normalizer/EntityCollectionNormalizer.php
@@ -47,6 +47,8 @@ public function normalize($object, $format = NULL, array $context = array()) {
    * {@inheritdoc}
    *
    * @throws \Symfony\Component\Serializer\Exception\UnexpectedValueException
+   *
+   * @todo Implement denormalization once normalization has settled.
    */
   public function denormalize($data, $class, $format = NULL, array $context = array()) {
   }