diff --git a/htdocs/salaries/class/paymentsalary.class.php b/htdocs/salaries/class/paymentsalary.class.php
index 6aee986396b..807d3537775 100644
--- a/htdocs/salaries/class/paymentsalary.class.php
+++ b/htdocs/salaries/class/paymentsalary.class.php
@@ -88,6 +88,11 @@ class PaymentSalary extends CommonObject
 	 */
 	public $fk_user_modif;
 
+	/**
+	 * @var array  Array with all fields and their property. Do not use it as a static var. It may be modified by constructor.
+	 */
+	public $fields = array();
+
 
 	/**
 	 *	Constructor