diff --git a/addons/website_portal_purchase/security/website_portal_purchase_security.xml b/addons/website_portal_purchase/security/website_portal_purchase_security.xml
index d689d887377..4acfc7dc3e0 100644
--- a/addons/website_portal_purchase/security/website_portal_purchase_security.xml
+++ b/addons/website_portal_purchase/security/website_portal_purchase_security.xml
@@ -5,7 +5,7 @@
         <record id="portal_purchase_order_user_rule" model="ir.rule">
             <field name="name">Portal Purchase Orders</field>
             <field name="model_id" ref="purchase.model_purchase_order"/>
-            <field name="domain_force">[('message_partner_ids','child_of',[user.commercial_partner_id.id])]</field>
+            <field name="domain_force">['|', ('message_partner_ids','child_of',[user.commercial_partner_id.id]),('partner_id', 'child_of', [user.commercial_partner_id.id])]</field>
             <field name="groups" eval="[(4, ref('base.group_portal'))]"/>
             <field name="perm_unlink" eval="1"/>
             <field name="perm_write" eval="1"/>
@@ -16,7 +16,7 @@
         <record id="portal_purchase_order_line_rule" model="ir.rule">
             <field name="name">Portal Purhcase Orders Line</field>
             <field name="model_id" ref="purchase.model_purchase_order_line"/>
-            <field name="domain_force">[('order_id.message_partner_ids','child_of',[user.commercial_partner_id.id])]</field>
+            <field name="domain_force">['|',('order_id.message_partner_ids','child_of',[user.commercial_partner_id.id]),('order_id.partner_id','child_of',[user.commercial_partner_id.id])]</field>
             <field name="groups" eval="[(4, ref('base.group_portal'))]"/>
         </record>