diff --git a/lib/class-wp-rest-menu-items-controller.php b/lib/class-wp-rest-menu-items-controller.php
index 6a56a72c7bc3e9..e908bebe31577b 100644
--- a/lib/class-wp-rest-menu-items-controller.php
+++ b/lib/class-wp-rest-menu-items-controller.php
@@ -671,7 +671,7 @@ public function prepare_item_for_response( $post, $request ) {
 
 		if ( rest_is_field_included( 'parent', $fields ) ) {
 			// Same as post_parent, expose as integer.
-			$data['parent'] = (int) $menu_item->post_parent;
+			$data['parent'] = (int) $menu_item->menu_item_parent;
 		}
 
 		if ( rest_is_field_included( 'menu_order', $fields ) ) {