diff --git a/htdocs/comm/propal.php b/htdocs/comm/propal.php
index 9b75519236e..c921e8ab189 100644
--- a/htdocs/comm/propal.php
+++ b/htdocs/comm/propal.php
@@ -913,7 +913,7 @@ else if ($action == 'updateligne' && $user->rights->propal->creer && GETPOST('sa
 			GETPOST('fk_parent_line'),
 			0,
 			$fournprice,
-			$buying_price,
+			$buyingprice,
 			$label,
 			$type
 		);