diff --git a/view/address_tree.xml b/view/address_tree.xml
index 72867e1cf1..e59d74cf3f 100644
--- a/view/address_tree.xml
+++ b/view/address_tree.xml
@@ -2,7 +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. -->
 <data>
-    <xpath expr="/tree/field[@name='subdivision']" position="after">
-        <field name="siret"/>
+    <xpath expr="/tree/field[@name='party']" position="after">
+        <field name="siret" optional="1"/>
     </xpath>
 </data>
diff --git a/view/party_tree.xml b/view/party_tree.xml
index 9898327e58..38e958425c 100644
--- a/view/party_tree.xml
+++ b/view/party_tree.xml
@@ -3,6 +3,6 @@
 this repository contains the full copyright notices and license terms. -->
 <data>
     <xpath expr="/tree/field[@name='tax_identifier']" position="after">
-        <field name="siren"/>
+        <field name="siren" optional="1"/>
     </xpath>
 </data>