diff --git a/htdocs/comm/pre.inc.php3 b/htdocs/comm/pre.inc.php3
index c98f8a7c2df..a53d12e0a18 100644
--- a/htdocs/comm/pre.inc.php3
+++ b/htdocs/comm/pre.inc.php3
@@ -48,9 +48,15 @@ function llxHeader($head = "", $urlp = "") {
       $menu->add("/fichinter/", "Fiches d'intervention");
     }
 
-  $menu->add("/product/", "Produits");
+  if ($conf->produit->enabled )
+    {
+      $menu->add("/product/", "Produits");
+    }
 
-  $menu->add("/service/", "Services");
+  if ($conf->service->enabled ) 
+    {
+      $menu->add("/service/", "Services");
+    }
 
   $menu->add("projet/", "Projets");