diff --git a/addons/event/event.py b/addons/event/event.py
index 04da0d6e463..b646b9e032b 100644
--- a/addons/event/event.py
+++ b/addons/event/event.py
@@ -158,6 +158,7 @@ class event_event(osv.osv):
         'state': 'draft',
         'company_id': lambda self,cr,uid,c: self.pool.get('res.company')._company_default_get(cr, uid, 'event.event', context=c),
         'user_id': lambda obj, cr, uid, context: uid,
+        'register_max': 1000,
     }
 
     def _check_closing_date(self, cr, uid, ids, context=None):