diff --git a/site_map.module b/site_map.module
index 904e573..92292d2 100644
--- a/site_map.module
+++ b/site_map.module
@@ -343,11 +343,11 @@ function _site_map_books() {
  */
 function _site_map_menus() {
   $output = '';
-  $class = array();
   $mids = array_filter(variable_get('site_map_show_menus', array()));
 
   if (!empty($mids)) {
     foreach ($mids as $mid) {
+	  $class = array();
       $menu = menu_load($mid);
       // Use menu_tree_all_data to retrieve the expanded tree.
       $tree = menu_tree_all_data($mid);