diff --git a/htdocs/core/actions_addupdatedelete.inc.php b/htdocs/core/actions_addupdatedelete.inc.php
index 5a93a6ded0b..1c874fd2418 100644
--- a/htdocs/core/actions_addupdatedelete.inc.php
+++ b/htdocs/core/actions_addupdatedelete.inc.php
@@ -261,7 +261,7 @@ if ($action == 'confirm_delete' && !empty($permissiontodelete))
 // Remove a line
 if ($action == 'confirm_deleteline' && $confirm == 'yes' && !empty($permissiontoadd))
 {
-	if (method_exists('deleteline', $object)) {
+	if (method_exists($object, 'deleteline')) {
 		$result = $object->deleteline($user, $lineid); // For backward compatibility
 	} else {
 		$result = $object->deleteLine($user, $lineid);