diff --git a/hr_timesheet_overtime_begin_end/models/account_analytic_line.py b/hr_timesheet_overtime_begin_end/models/account_analytic_line.py
index 6e5eae2..2f5c760 100644
--- a/hr_timesheet_overtime_begin_end/models/account_analytic_line.py
+++ b/hr_timesheet_overtime_begin_end/models/account_analytic_line.py
@@ -26,7 +26,12 @@ class AnalyticLine(models.Model):
     # functions instead of the aforementioned methods.
     @api.model
     def _update_values(self, values):
-        return
+        time_start = values.get("time_start", self.time_start)
+        time_stop = values.get("time_stop", self.time_stop)
+        # Do not double-compute if we're using times.
+        if time_start or time_stop:
+            return
+        return super()._update_values(values)
 
     def unit_amount_from_start_stop(self):
         result = super().unit_amount_from_start_stop()
diff --git a/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py b/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
index 60d742c..af141ff 100644
--- a/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
+++ b/hr_timesheet_overtime_begin_end/tests/test_analytic_line.py
@@ -64,3 +64,11 @@ def test_rate_not_double_applied(self):
         # The rate was already applied on the transient record. Don't also apply
         # it on creation.
         self.assertEqual(line_record.unit_amount, 4.0)
+
+    def test_rate_applied_if_no_times(self):
+        line = self.base_line()
+        del line["time_start"]
+        del line["time_stop"]
+        line["unit_amount"] = 1
+        line_record = self.env["account.analytic.line"].create(line)
+        self.assertEqual(line_record.unit_amount, 2)