diff --git a/htdocs/telephonie/distributeurs/pre.inc.php b/htdocs/telephonie/distributeurs/pre.inc.php
index 0146a4a0725..057fbe575b0 100644
--- a/htdocs/telephonie/distributeurs/pre.inc.php
+++ b/htdocs/telephonie/distributeurs/pre.inc.php
@@ -23,6 +23,7 @@ require("../../main.inc.php");
 
 $user->getrights('telephonie');
 require DOL_DOCUMENT_ROOT.'/telephonie/distributeurtel.class.php';
+require DOL_DOCUMENT_ROOT.'/telephonie/telephonie.commercial.class.php';
 
 function llxHeader($head = "", $title="") {
   global $user, $conf, $db;