diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index 89d345c5f98..f97a8e8dd3b 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -310,7 +310,15 @@ class Societe extends CommonObject
      * @var int
      */
     var $commercial_id;
+    /**
+     * Id of parent thirdparty (if one)
+     * @var int
+     */
     var $parent;
+    /**
+     * Default language code of thirdparty (en_US, ...)
+     * @var string
+     */
     var $default_lang;
 
     var $ref;