diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae5f1f8f8..185ed7fc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Optimized notifications system
 - Fix a bug: when many users with too many unread notifications are connected at the same time, the system kill the application due to memory overflow
+- Fix a bug: ReservationReminderWorker crash with undefined method find_by
 
 ## v2.4.9 2017 January 4
 
diff --git a/app/workers/reservation_reminder_worker.rb b/app/workers/reservation_reminder_worker.rb
index 68d723dfc..5aff73feb 100644
--- a/app/workers/reservation_reminder_worker.rb
+++ b/app/workers/reservation_reminder_worker.rb
@@ -16,7 +16,7 @@ class ReservationReminderWorker
         already_sent = Notification.where(
             attached_object_type: Reservation.name,
             attached_object_id: r.id,
-            notification_type_id: NotificationType.find_by(name: 'notify_member_reservation_reminder')
+            notification_type_id: NotificationType.find_by_name('notify_member_reservation_reminder')
         ).count
         unless already_sent > 0
           NotificationCenter.call type: 'notify_member_reservation_reminder',