diff --git a/src/EntityReferenceRevisionsFieldItemList.php b/src/EntityReferenceRevisionsFieldItemList.php
index dc9e92d..c2496f8 100644
--- a/src/EntityReferenceRevisionsFieldItemList.php
+++ b/src/EntityReferenceRevisionsFieldItemList.php
@@ -18,7 +18,7 @@ class EntityReferenceRevisionsFieldItemList extends EntityReferenceFieldItemList
   /**
    * {@inheritdoc}
    */
-  public function referencedEntities() {
+  public function referencedEntities(string $langcode = NULL) {
     $target_entities = [];
     foreach ($this->list as $delta => $item) {
       if ($item->entity) {