diff --git a/htdocs/contrat/card.php b/htdocs/contrat/card.php
index babda9eff3c..e75342f252b 100644
--- a/htdocs/contrat/card.php
+++ b/htdocs/contrat/card.php
@@ -1392,9 +1392,9 @@ else
             print '<form name="update" action="'.$_SERVER['PHP_SELF'].'?id='.$object->id.'" method="post">';
             print '<input type="hidden" name="token" value="'.$_SESSION['newtoken'].'">';
             print '<input type="hidden" name="action" value="updateligne">';
-            print '<input type="hidden" name="elrowid" value="'.GETPOST('rowid').'">';
-            print '<input type="hidden" name="idprod" value="'.($objp->fk_product?$objp->fk_product:'0').'">';
-            print '<input type="hidden" name="fournprice" value="'.($objp->fk_fournprice?$objp->fk_fournprice:'0').'">';
+            print '<input type="hidden" name="elrowid" value="'.$object->lines[$cursorline-1]->id.'">';
+            print '<input type="hidden" name="idprod" value="'.(!empty($object->lines[$cursorline-1]->fk_product) ? $object->lines[$cursorline-1]->fk_product : 0).'">';
+            print '<input type="hidden" name="fournprice" value="'.(!empty($object->lines[$cursorline-1]->fk_fournprice) ? $object->lines[$cursorline-1]->fk_fournprice : 0).'">';
 
             // Area with common detail of line
             print '<table class="notopnoleftnoright allwidth tableforservicepart1" width="100%">';