diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index 0ec6652f20b..6448dbbf622 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -49,6 +49,11 @@ class Project extends CommonObject
 	 */
 	public $table_element_line = 'projet_task';
 
+    /**
+	 * @var int    Name of field date
+	 */
+	public $table_element_date;
+
     /**
 	 * @var int Field with ID of parent key if this field has a parent
 	 */