diff --git a/core/modules/rest/lib/Drupal/rest/Plugin/views/row/DataFieldRow.php b/core/modules/rest/lib/Drupal/rest/Plugin/views/row/DataFieldRow.php
index ad2901c..6eb9b22 100644
--- a/core/modules/rest/lib/Drupal/rest/Plugin/views/row/DataFieldRow.php
+++ b/core/modules/rest/lib/Drupal/rest/Plugin/views/row/DataFieldRow.php
@@ -183,7 +183,7 @@ public function getFieldKeyAlias($id) {
    */
   protected static function extractFromOptionsArray($key, $options) {
     return array_map(function($item) use ($key) {
-      return isset($key, $item) ? $item[$key] : NULL;
+      return isset($item[$key]) ? $item[$key] : NULL;
     }, $options);
   }