diff --git a/view/purchase_line_tree_sequence.xml b/view/purchase_line_tree_sequence.xml
index 60eac86d94..2362be863b 100644
--- a/view/purchase_line_tree_sequence.xml
+++ b/view/purchase_line_tree_sequence.xml
@@ -2,6 +2,7 @@
 <!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
 this repository contains the full copyright notices and license terms. -->
 <tree string="Lines" sequence="sequence">
+    <field name="purchase"/>
     <field name="type"/>
     <field name="product"/>
     <field name="description"/>