diff --git a/core/lib/Drupal/Core/TypedData/Type/DurationInterface.php b/core/lib/Drupal/Core/TypedData/Type/DurationInterface.php
index 56d3b51..9f8e176 100644
--- a/core/lib/Drupal/Core/TypedData/Type/DurationInterface.php
+++ b/core/lib/Drupal/Core/TypedData/Type/DurationInterface.php
@@ -2,17 +2,15 @@
 
 /**
  * @file
- * Contains \Drupal\Core\TypedData\Type\BinaryInterface.
+ * Contains \Drupal\Core\TypedData\Type\DurationInterface.
  */
 
 namespace Drupal\Core\TypedData\Type;
 
-use Drupal\Core\TypedData\PrimitiveInterface;
-
 /**
- * Interface for binary data.
+ * Interface for durations.
  */
-interface DurationInterface extends PrimitiveInterface {
+interface DurationInterface {
 
   /**
    * Returns the duration.