Index: src/wp-admin/network/users.php
===================================================================
--- src/wp-admin/network/users.php	(revision 26862)
+++ src/wp-admin/network/users.php	(working copy)
@@ -96,7 +96,7 @@
 			check_admin_referer( 'deleteuser' );
 
 			$id = intval( $_GET['id'] );
-			if ( $id != '0' && $id != '1' ) {
+			if ( $id != '0' ) {
 				$_POST['allusers'] = array( $id ); // confirm_delete_users() can only handle with arrays
 				$title = __( 'Users' );
 				$parent_file = 'users.php';