diff --git a/addons/event/models/event_event.py b/addons/event/models/event_event.py
index 0e8f6b3cf34..2a3a4597c9d 100644
--- a/addons/event/models/event_event.py
+++ b/addons/event/models/event_event.py
@@ -117,7 +117,6 @@ class EventEvent(models.Model):
     # Seats and computation
     seats_max = fields.Integer(
         string='Maximum Attendees Number',
-        readonly=True,
         help="For each event you can define a maximum registration of seats(number of attendees), above this numbers the registrations are not accepted.")
     seats_availability = fields.Selection(
         [('limited', 'Limited'), ('unlimited', 'Unlimited')],