diff --git a/htdocs/includes/modules/facture/modules_facture.php b/htdocs/includes/modules/facture/modules_facture.php
index 2b57f74f104..ec8008f3a45 100644
--- a/htdocs/includes/modules/facture/modules_facture.php
+++ b/htdocs/includes/modules/facture/modules_facture.php
@@ -160,7 +160,7 @@ function facture_meta_create($db, $facid, $message="")
   
   if ($conf->facture->dir_output)
     {
-      $facref = sanitize_string($forbidden_chars,"_",$fac->ref); 
+      $facref = sanitize_string($fac->ref); 
       $dir = $conf->facture->dir_output . "/" . $facref ; 
       $file = $dir . "/" . $facref . ".meta";