diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
index 77c9f2a..d4808ee 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/TimestampAgoFormatter.php
@@ -186,7 +186,7 @@ protected function formatTimestamp($timestamp) {
     $granularity = $this->getSetting('granularity');
     $options = [
       'granularity' => $granularity,
-      'render_as_object' => TRUE,
+      'return_as_object' => TRUE,
     ];
 
     if ($this->request->server->get('REQUEST_TIME') > $timestamp) {