diff --git a/htdocs/compta/prelevement/class/bonprelevement.class.php b/htdocs/compta/prelevement/class/bonprelevement.class.php
index f720d088b6d..be946d31a19 100644
--- a/htdocs/compta/prelevement/class/bonprelevement.class.php
+++ b/htdocs/compta/prelevement/class/bonprelevement.class.php
@@ -1278,6 +1278,7 @@ class BonPrelevement extends CommonObject
 	 * File is generated with name this->filename
 	 *
 	 *  @param		string	$format		FRST, RCUR or ALL
+         * @param string $executiondate
 	 *	@return		int					0 if OK, <0 if KO
 	 */
 	function generate($format='ALL',$executiondate='')