diff --git a/core/lib/Drupal/Core/TypedData/Type/Map.php b/core/lib/Drupal/Core/TypedData/Type/Map.php
index a1d474d..d7df77a 100644
--- a/core/lib/Drupal/Core/TypedData/Type/Map.php
+++ b/core/lib/Drupal/Core/TypedData/Type/Map.php
@@ -9,8 +9,6 @@
 
 use Drupal\Core\TypedData\ContextAwareTypedData;
 use Drupal\Core\TypedData\ComplexDataInterface;
-use ArrayIterator;
-use IteratorAggregate;
 
 /**
  * The "map" data type.
@@ -22,7 +20,7 @@
  * By default there is no metadata for contained properties. Extending classes
  * may want to override Map::getPropertyDefinitions() to define it.
  */
-class Map extends ContextAwareTypedData implements IteratorAggregate, ComplexDataInterface {
+class Map extends ContextAwareTypedData implements \IteratorAggregate, ComplexDataInterface {
 
   /**
    * An array of values for the contained properties.
@@ -140,7 +138,7 @@ public function setPropertyValues($values) {
    * Implements \IteratorAggregate::getIterator().
    */
   public function getIterator() {
-    return new ArrayIterator($this->getProperties());
+    return new \ArrayIterator($this->getProperties());
   }
 
   /**