diff --git a/htdocs/api/class/api.class.php b/htdocs/api/class/api.class.php
index de5a1e75d0a..eb5cd3c73fb 100644
--- a/htdocs/api/class/api.class.php
+++ b/htdocs/api/class/api.class.php
@@ -106,8 +106,6 @@ class DolibarrApi
         // Remove linkedObjects. We should already have linkedObjectIds that avoid huge responses
         unset($object->linkedObjects);
 
-        unset($object->lignes); // we don't want lignes, we want only ->lines
-
         unset($object->fields);
         unset($object->oldline);