diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 2cd62d7bac..97e1e8e340 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -2185,7 +2185,7 @@ function confirm_box($check, $title = '', $hidden = '', $html_body = 'confirm_bo
 
 	// re-add sid / transform & to & for user->page (user->page is always using &)
 	$use_page = ($u_action) ? $u_action : str_replace('&', '&', $user->page['page']);
-	$u_action = reapply_sid($phpbb_path_helper->get_valid_page($use_page, $config['enable_mod_rewrite']), $phpbb_path_helper->is_router_used());
+	$u_action = reapply_sid($phpbb_path_helper->get_valid_page($use_page, $config['enable_mod_rewrite']));
 	$u_action .= ((strpos($u_action, '?') === false) ? '?' : '&') . 'confirm_key=' . $confirm_key;
 
 	$template->assign_vars(array(