diff --git a/src/wp-includes/block-editor.php b/src/wp-includes/block-editor.php
index 4227c674c02ff..b5ab90a7e47d6 100644
--- a/src/wp-includes/block-editor.php
+++ b/src/wp-includes/block-editor.php
@@ -316,7 +316,9 @@ function get_legacy_widget_block_editor_settings() {
 function _wp_get_iframed_editor_assets() {
 	global $pagenow;
 
-	$script_handles = array();
+	$script_handles = array(
+		'wp-polyfill',
+	);
 	$style_handles  = array(
 		'wp-block-editor',
 		'wp-block-library',