diff --git a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
index a6892d24f3..93fb9ca39b 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
@@ -44,7 +44,7 @@ public function getDataDefinition();
    *
    * @return mixed
    */
-  public function getValue();
+  public function getValue($include_computed = FALSE);
 
   /**
    * Sets the data value.