diff --git a/addons/event_sale/data/event_sale_data.xml b/addons/event_sale/data/event_sale_data.xml
index 725bc51f757..79cbbe1256f 100644
--- a/addons/event_sale/data/event_sale_data.xml
+++ b/addons/event_sale/data/event_sale_data.xml
@@ -14,6 +14,7 @@
             <field name="uom_po_id" ref="uom.product_uom_unit"/>
             <field name="name">Event Registration</field>
             <field name="description_sale" eval="False"/>
+            <field name="invoice_policy">order</field>
             <field name="categ_id" ref="event_sale.product_category_events"/>
             <field name="type">service</field>
         </record>
diff --git a/addons/event_sale/models/product.py b/addons/event_sale/models/product.py
index a898046647e..a3a93497f21 100644
--- a/addons/event_sale/models/product.py
+++ b/addons/event_sale/models/product.py
@@ -13,6 +13,7 @@ class ProductTemplate(models.Model):
     def _onchange_event_ok(self):
         if self.event_ok:
             self.type = 'service'
+            self.invoice_policy = 'order'
 
 
 class Product(models.Model):
@@ -25,3 +26,4 @@ class Product(models.Model):
         """ Redirection, inheritance mechanism hides the method on the model """
         if self.event_ok:
             self.type = 'service'
+            self.invoice_policy = 'order'