diff --git a/htdocs/telephonie/stats/factures/pre.inc.php b/htdocs/telephonie/stats/factures/pre.inc.php
index e0bb7477ef7..78329b5eb5f 100644
--- a/htdocs/telephonie/stats/factures/pre.inc.php
+++ b/htdocs/telephonie/stats/factures/pre.inc.php
@@ -20,6 +20,7 @@
  *
  */
 require("../../../main.inc.php");
+require_once DOL_DOCUMENT_ROOT.'/telephonie/stats/tools.lib.php';
 
 $user->getrights('telephonie');