diff --git a/hotel_channel_connector_wubook/models/hotel_reservation/importer.py b/hotel_channel_connector_wubook/models/hotel_reservation/importer.py
index 67801a825..48230ee94 100644
--- a/hotel_channel_connector_wubook/models/hotel_reservation/importer.py
+++ b/hotel_channel_connector_wubook/models/hotel_reservation/importer.py
@@ -310,7 +310,7 @@ class HotelReservationImporter(Component):
                 ])
                 used_rooms = []
                 if modified_reservations:
-                    used_rooms = modified_reservations.mapped('room_id')
+                    used_rooms = modified_reservations.mapped('room_id.id')
                 reservation = reservations.filtered(
                     lambda res: res.room_type_id == room_type_bind.odoo_id and
                     res.checkin == checkin and res.checkout == checkout and