Index: src/wp-includes/class-wp-customize-nav-menus.php
===================================================================
--- src/wp-includes/class-wp-customize-nav-menus.php	(revision 35390)
+++ src/wp-includes/class-wp-customize-nav-menus.php	(working copy)
@@ -109,6 +109,8 @@
 		if ( 'post_type' === $type ) {
 			if ( ! get_post_type_object( $object ) ) {
 				return new WP_Error( 'nav_menus_invalid_post_type' );
+			} else {
+				$post_type = get_post_type_object( $object );
 			}
 
 			if ( 0 === $page && 'page' === $object ) {
@@ -121,6 +123,16 @@
 					'object'     => '',
 					'url'        => home_url(),
 				);
+			} elseif ( 'post' !== $object && 0 === $page && $post_type->has_archive ) {
+				// Add a post type archive link.
+				$items[] = array(
+					'id'         => $object . '-archive',
+					'title'      => $post_type->labels->archives,
+					'type'       => 'post_type_archive',
+					'type_label' => __( 'Post Type Archive' ),
+					'object'     => '',
+					'url'        => get_post_type_archive_link( $object ),
+				);
 			}
 
 			$posts = get_posts( array(