diff --git a/verdigado_attendance/__manifest__.py b/verdigado_attendance/__manifest__.py
index 1e63826..6182cd5 100644
--- a/verdigado_attendance/__manifest__.py
+++ b/verdigado_attendance/__manifest__.py
@@ -17,6 +17,7 @@
         "hr_attendance_autoclose",
         "hr_attendance_break",
         "hr_attendance_break_autoclose",
+        "hr_attendance_missing_days",
         "hr_holidays_attendance",
         "l10n_de_holidays",
         "hr_holidays_public_overtime",
@@ -26,6 +27,8 @@
     "data": [
         "data/base_ical.xml",
         "data/hr_leave_type.xml",
+        "data/ir_cron.xml",
+        "data/res_company.xml",
         "data/res.lang.csv",
         "security/verdigado_attendance.xml",
         "security/ir.model.access.csv",
diff --git a/verdigado_attendance/data/ir_cron.xml b/verdigado_attendance/data/ir_cron.xml
new file mode 100644
index 0000000..ecc6c77
--- /dev/null
+++ b/verdigado_attendance/data/ir_cron.xml
@@ -0,0 +1,5 @@
+<odoo>
+    <record id="hr_attendance_missing_days.missing_attendance_cron" model="ir.cron">
+        <field name="active" eval="True" />
+    </record>
+</odoo>
diff --git a/verdigado_attendance/data/res_company.xml b/verdigado_attendance/data/res_company.xml
new file mode 100644
index 0000000..61f1bfb
--- /dev/null
+++ b/verdigado_attendance/data/res_company.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<odoo>
+    <record model="res.company" id="base.main_company">
+        <field
+            name="attendance_missing_days_reason"
+            ref="hr_attendance_missing_days.attendance_reason_missing_days"
+        />
+    </record>
+</odoo>
diff --git a/verdigado_attendance/migrations/15.0.1.0.1/post-fix-hr_attendance_missing_days-config.py b/verdigado_attendance/migrations/15.0.1.0.1/post-fix-hr_attendance_missing_days-config.py
new file mode 100644
index 0000000..a6d6067
--- /dev/null
+++ b/verdigado_attendance/migrations/15.0.1.0.1/post-fix-hr_attendance_missing_days-config.py
@@ -0,0 +1,18 @@
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version=None):
+    """Force load hr_attendance_missing_days' configuration"""
+    openupgrade.load_data(
+        env.cr,
+        "verdigado_attendance",
+        "data/ir_cron.xml",
+    )
+    openupgrade.load_data(
+        env.cr,
+        "verdigado_attendance",
+        "data/res_company.xml",
+    )
+    # and recreate possibly missing overtime
+    env["hr.attendance"].search([])._update_overtime()
diff --git a/verdigado_attendance/models/hr_attendance.py b/verdigado_attendance/models/hr_attendance.py
index 3b6c28b..3c391ac 100644
--- a/verdigado_attendance/models/hr_attendance.py
+++ b/verdigado_attendance/models/hr_attendance.py
@@ -10,3 +10,28 @@ class HrAttendance(models.Model):
 
     check_in = DatetimeWithoutSeconds()
     check_out = DatetimeWithoutSeconds()
+
+    def _update_overtime(self, employee_attendance_dates=None):
+        """Recreate missing overtime records"""
+        result = super()._update_overtime(
+            employee_attendance_dates=employee_attendance_dates
+        )
+        if employee_attendance_dates is None:
+            employee_attendance_dates = self._get_attendances_dates()
+        missing_vals = []
+        for employee, attendance_dates in employee_attendance_dates.items():
+            dates = [attendance_date for _dummy, attendance_date in attendance_dates]
+            existing_overtime = self.env["hr.attendance.overtime"].search(
+                [
+                    ("employee_id", "=", employee.id),
+                    ("company_id", "=", self.env.company.id),
+                    ("date", "in", dates),
+                ]
+            )
+            missing_vals += [
+                {"employee_id": employee.id, "date": attendance_date}
+                for attendance_date in set(dates)
+                - set(existing_overtime.mapped("date"))
+            ]
+        self.env["hr.attendance.overtime"].create(missing_vals)
+        return result