diff --git a/addons/resource/models/resource_mixin.py b/addons/resource/models/resource_mixin.py
index 9c21f7f935f..93def349165 100644
--- a/addons/resource/models/resource_mixin.py
+++ b/addons/resource/models/resource_mixin.py
@@ -4,6 +4,8 @@
 from datetime import timedelta
 
 from odoo import api, fields, models
+from odoo.tools import float_utils
+
 
 class ResourceMixin(models.AbstractModel):
     _name = "resource.mixin"
@@ -46,7 +48,7 @@ class ResourceMixin(models.AbstractModel):
             theoric_hours = self.get_day_work_hours_count(day_intervals[0][0].date(), calendar=calendar)
             work_time = sum((interval[1] - interval[0] for interval in day_intervals), timedelta())
             total_work_time += work_time
-            days_count += round((work_time.total_seconds() / 3600 / theoric_hours) * 4) / 4
+            days_count += float_utils.round((work_time.total_seconds() / 3600 / theoric_hours) * 4) / 4
         return {
             'days': days_count,
             'hours': total_work_time.total_seconds() / 3600,
@@ -69,7 +71,7 @@ class ResourceMixin(models.AbstractModel):
         for day_intervals in calendar._iter_leave_intervals(from_datetime, to_datetime, self.resource_id.id):
             theoric_hours = self.get_day_work_hours_count(day_intervals[0][0].date(), calendar=calendar)
             leave_time = sum((interval[1] - interval[0] for interval in day_intervals), timedelta())
-            days_count += round((leave_time.total_seconds() / 3600 / theoric_hours) * 4) / 4
+            days_count += float_utils.round((leave_time.total_seconds() / 3600 / theoric_hours) * 4) / 4
         return days_count
 
     def iter_leaves(self, from_datetime, to_datetime, calendar=None):