diff --git a/htdocs/core/modules/contract/doc/pdf_strato.modules.php b/htdocs/core/modules/contract/doc/pdf_strato.modules.php
index 9b3446a846a..2dc2acbcb6d 100644
--- a/htdocs/core/modules/contract/doc/pdf_strato.modules.php
+++ b/htdocs/core/modules/contract/doc/pdf_strato.modules.php
@@ -6,6 +6,7 @@
  * Copyright (C) 2011		Fabrice CHERRIER
  * Copyright (C) 2013-2018  Philippe Grand	            <philippe.grand@atoo-net.com>
  * Copyright (C) 2015       Marcos García               <marcosgdf@gmail.com>
+ * Copyright (C) 2018       Frédéric France             <frederic.france@netlogic.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -550,7 +551,7 @@ class pdf_strato extends ModelePDFContract
      * @param   PDF         $pdf            Object PDF
      * @param   int         $tab_top        tab height position
      * @param   int         $tab_height     tab height
-     * @param   Translate   $outputlang     langage
+     * @param   Translate   $outputlangs    Object language for output
      * @return void
      */
 	private function tabSignature(&$pdf, $tab_top, $tab_height, $outputlangs)