diff --git a/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
index 6069cec..43ff5f1 100644
--- a/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityStorageControllerBase.php
@@ -144,7 +144,7 @@ public function invokeFieldMethod($method, EntityInterface $entity) {
       // @todo getTranslation() only works on NG entities. Remove the condition
       // and the second code branch when all core entity types are converted.
       if ($translation = $entity->getTranslation($langcode)) {
-        foreach ($translation as $field_name => $field) {
+        foreach ($translation as $field) {
           $field->$method();
         }
       }