diff --git a/src/wp-admin/load-scripts.php b/src/wp-admin/load-scripts.php
index d536c1925a..5f434b28a3 100644
--- a/src/wp-admin/load-scripts.php
+++ b/src/wp-admin/load-scripts.php
@@ -24,6 +24,7 @@ $load = array_unique( explode( ',', $load ) );
 if ( empty($load) )
 	exit;
 
+require( ABSPATH . 'wp-vendor/autoload_52.php' );
 require( ABSPATH . 'wp-admin/includes/noop.php' );
 require( ABSPATH . WPINC . '/script-loader.php' );
 require( ABSPATH . WPINC . '/version.php' );
diff --git a/src/wp-admin/load-styles.php b/src/wp-admin/load-styles.php
index de20881418..9a37541e3b 100644
--- a/src/wp-admin/load-styles.php
+++ b/src/wp-admin/load-styles.php
@@ -14,6 +14,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 
 define( 'WPINC', 'wp-includes' );
 
+require( ABSPATH . 'wp-vendor/autoload_52.php' );
 require( ABSPATH . 'wp-admin/includes/noop.php' );
 require( ABSPATH . WPINC . '/script-loader.php' );
 require( ABSPATH . WPINC . '/version.php' );