diff --git a/addons/event/views/event_views.xml b/addons/event/views/event_views.xml
index aaf2df32a89..23af02dc800 100644
--- a/addons/event/views/event_views.xml
+++ b/addons/event/views/event_views.xml
@@ -287,7 +287,7 @@
                     <field name="event_type_id"/>
                     <field name="date_begin"/>
                     <field name="date_end"/>
-                    <field name="seats_reserved"/>
+                    <field name="seats_reserved" sum="Total"/>
                     <field name="seats_min"/>
                     <field name="seats_max" invisible="1"/>
                     <field name="user_id"/>