diff --git a/include/functions_html.inc.php b/include/functions_html.inc.php
index a9dc14294..b175f12b4 100644
--- a/include/functions_html.inc.php
+++ b/include/functions_html.inc.php
@@ -338,6 +338,7 @@ function get_html_menu_category($categories)
   global $page, $lang;
 
   $ref_level = 0;
+  $level = 0;
   $menu = '';
   
   foreach ($categories as $category)