diff --git a/addons/fleet/models/fleet_vehicle.py b/addons/fleet/models/fleet_vehicle.py
index a7084f7955a..a7737fcfbe7 100644
--- a/addons/fleet/models/fleet_vehicle.py
+++ b/addons/fleet/models/fleet_vehicle.py
@@ -19,7 +19,8 @@ class FleetVehicle(models.Model):
     name = fields.Char(compute="_compute_vehicle_name", store=True)
     active = fields.Boolean('Active', default=True, track_visibility="onchange")
     company_id = fields.Many2one('res.company', 'Company')
-    license_plate = fields.Char(required=True, help='License plate number of the vehicle (i = plate number for a car)')
+    license_plate = fields.Char(required=True, track_visibility="onchange",
+        help='License plate number of the vehicle (i = plate number for a car)')
     vin_sn = fields.Char('Chassis Number', help='Unique number written on the vehicle motor (VIN/SN number)', copy=False)
     driver_id = fields.Many2one('res.partner', 'Driver', help='Driver of the vehicle', copy=False)
     model_id = fields.Many2one('fleet.vehicle.model', 'Model', required=True, help='Model of the vehicle')
diff --git a/addons/l10n_be_hr_payroll_fleet/models/fleet.py b/addons/l10n_be_hr_payroll_fleet/models/fleet.py
index 2580fae49c1..36812db24b5 100644
--- a/addons/l10n_be_hr_payroll_fleet/models/fleet.py
+++ b/addons/l10n_be_hr_payroll_fleet/models/fleet.py
@@ -13,7 +13,8 @@ class FleetVehicle(models.Model):
 
     co2_fee = fields.Float(compute='_compute_co2_fee', string="CO2 Fee")
     total_depreciated_cost = fields.Float(compute='_compute_total_depreciated_cost',
-        string="Total Cost (Depreciated)", help="This includes all the depreciated costs and the CO2 fee")
+        string="Total Cost (Depreciated)", track_visibility="onchange",
+        help="This includes all the depreciated costs and the CO2 fee")
     total_cost = fields.Float(compute='_compute_total_cost', string="Total Cost", help="This include all the costs and the CO2 fee")
     fuel_type = fields.Selection(required=True, default='diesel')
     atn = fields.Float(compute='_compute_car_atn', string="ATN")