diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index 6e7914d9206..d5b7b03ae42 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -7,7 +7,8 @@
  * Copyright (C) 2014		Marcos García		<marcosgdf@gmail.com>
  * Copyright (C) 2015		Bahfir Abbes		<bafbes@gmail.com>
  * Copyright (C) 2016-2017	Ferran Marcet		<fmarcet@2byte.es>
-
+ * Copyright (C) 2019       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
  * the Free Software Foundation; either version 3 of the License, or
@@ -271,7 +272,7 @@ class FormFile
 	 *      @param      string				$modulesubdir       Existing (so sanitized) sub-directory to scan (Example: '0/1/10', 'FA/DD/MM/YY/9999'). Use '' if file is not into subdir of module.
 	 *      @param      string				$filedir            Directory to scan
 	 *      @param      string				$urlsource          Url of origin page (for return)
-	 *      @param      int					$genallowed         Generation is allowed (1/0 or array list of templates)
+	 *      @param      int|string[]        $genallowed         Generation is allowed (1/0 or array list of templates)
 	 *      @param      int					$delallowed         Remove is allowed (1/0)
 	 *      @param      string				$modelselected      Model to preselect by default
 	 *      @param      integer				$allowgenifempty	Allow generation even if list of template ($genallowed) is empty (show however a warning)