diff --git a/classes/order/OrderSlip.php b/classes/order/OrderSlip.php
index 96d8118cc..c02dd2f62 100644
--- a/classes/order/OrderSlip.php
+++ b/classes/order/OrderSlip.php
@@ -67,9 +67,9 @@ class OrderSlipCore extends ObjectModel
 			'id_customer' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
 			'id_order' => 				array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
 			'conversion_rate' => 		array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
-			'amount' => 				array('type' => self::TYPE_INT),
+			'amount' => 				array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat'),
 			'shipping_cost' => 			array('type' => self::TYPE_INT),
-			'shipping_cost_amount' =>	array('type' => self::TYPE_FLOAT),
+			'shipping_cost_amount' =>	array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat'),
 			'partial' =>				array('type' => self::TYPE_INT),
 			'date_add' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
 			'date_upd' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),