diff --git a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
index 0e63301..7b038e5 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
@@ -26,7 +26,7 @@
    * @param string|null $name
    *   (optional) The name of the created property, or NULL if it is the root
    *   of a typed data tree. Defaults to NULL.
-   * @param \Drupal\Core\TypedData\TypedDataInterface $parent
+   * @param \Drupal\Core\TypedData\TraversableTypedDataInterface $parent
    *   (optional) The parent object of the data property, or NULL if it is the
    *   root of a typed data tree. Defaults to NULL.
    *
@@ -36,7 +36,7 @@
    *
    * @see \Drupal\Core\TypedData\TypedDataManager::create()
    */
-  public static function createInstance($definition, $name = NULL, TypedDataInterface $parent = NULL);
+  public static function createInstance($definition, $name = NULL, TraversableTypedDataInterface $parent = NULL);
 
   /**
    * Gets the data definition.
@@ -159,9 +159,9 @@ public function getPropertyPath();
    * @param string|null $name
    *   (optional) The name of the property or the delta of the list item,
    *   or NULL if it is the root of a typed data tree. Defaults to NULL.
-   * @param \Drupal\Core\TypedData\TypedDataInterface|null $parent
+   * @param \Drupal\Core\TypedData\TraversableTypedDataInterface|null $parent
    *   (optional) The parent object of the data property, or NULL if it is the
    *   root of a typed data tree. Defaults to NULL.
    */
-  public function setContext($name = NULL, TypedDataInterface $parent = NULL);
+  public function setContext($name = NULL, TraversableTypedDataInterface $parent = NULL);
 }
diff --git a/core/modules/locale/src/LocaleTypedConfig.php b/core/modules/locale/src/LocaleTypedConfig.php
index f4c0138..ee0b470 100644
--- a/core/modules/locale/src/LocaleTypedConfig.php
+++ b/core/modules/locale/src/LocaleTypedConfig.php
@@ -127,7 +127,7 @@ protected function canTranslate($from_langcode, $to_langcode) {
    */
   protected function getElementTranslation(TypedDataInterface $element, array $options) {
     $translation = array();
-    if ($element instanceof \Traversable) {
+    if ($element instanceof TraversableTypedDataInterface) {
       $translation = $this->getArrayTranslation($element, $options);
     }
     elseif ($this->translateElement($element, $options)) {