diff --git a/htdocs/compta/prelevement/pre.inc.php b/htdocs/compta/prelevement/pre.inc.php
index d7342e92370..844beb4b7fe 100644
--- a/htdocs/compta/prelevement/pre.inc.php
+++ b/htdocs/compta/prelevement/pre.inc.php
@@ -27,6 +27,8 @@
 */
 
 require("../../main.inc.php");
+require_once DOL_DOCUMENT_ROOT."/bon-prelevement.class.php";
+
 
 function llxHeader($head = "", $title="", $help_url='')
 {