diff --git a/htdocs/contrat/class/api_contracts.class.php b/htdocs/contrat/class/api_contracts.class.php
index 68ace23a26a..2becf6fcfb7 100644
--- a/htdocs/contrat/class/api_contracts.class.php
+++ b/htdocs/contrat/class/api_contracts.class.php
@@ -660,11 +660,6 @@ class Contracts extends DolibarrApi
 		$object = parent::_cleanObjectDatas($object);
 
 		unset($object->address);
-
-		unset($object->date_start);
-		unset($object->date_start_real);
-		unset($object->date_end);
-		unset($object->date_end_real);
 		unset($object->civility_id);
 
 		return $object;