diff --git a/htdocs/lib/functions.inc.php b/htdocs/lib/functions.inc.php
index 1a2fdbedea4..73c72d09875 100644
--- a/htdocs/lib/functions.inc.php
+++ b/htdocs/lib/functions.inc.php
@@ -1373,5 +1373,10 @@ function departement_rowid($db,$code, $pays_id)
     }
 }
 
+function get_exdir($num)
+{
+  $num = substr("000".$num, -3);
+  return substr($num, 0,1).'/'.substr($num, 1,1).'/'.substr($num, 2,1).'/';
+}
 
 ?>