diff --git a/addons/event_sale/event_sale_view.xml b/addons/event_sale/event_sale_view.xml
index 81bdfabf765..4387e3a725a 100644
--- a/addons/event_sale/event_sale_view.xml
+++ b/addons/event_sale/event_sale_view.xml
@@ -24,8 +24,8 @@
              <field name="arch" type="xml">
                 <xpath expr="//field[@name='discount']" position="after">
                     <field name="event_id" colspan="3" domain="[('type', 'in', list(set((event_type_id,False))))]" attrs="{'invisible': [('event_ok', '=', False)],'required': [('event_ok', '!=', False)]}"/>
-                    <field name="event_type_id" />
-                    <field name="event_ok"/>
+                    <field name="event_type_id" invisible="1"/>
+                    <field name="event_ok" invisible="1"/>
                 </xpath>
              </field>
         </record>