diff --git a/lib/load.php b/lib/load.php
index 290135fe5af35f..f1a8b09c66ce80 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -13,6 +13,7 @@
 // which this class will exist if that is the case.
 if ( class_exists( 'WP_REST_Controller' ) ) {
 	require dirname( __FILE__ ) . '/class-wp-rest-blocks-controller.php';
+	require dirname( __FILE__ ) . '/class-wp-rest-autosaves-controller.php';
 	require dirname( __FILE__ ) . '/class-wp-rest-block-renderer-controller.php';
 	require dirname( __FILE__ ) . '/rest-api.php';
 }