diff --git a/l10n_us_hr_payroll_401k/migrations/13.0.0.0.1/pre-migration.py b/l10n_us_hr_payroll_401k/migrations/13.0.0.0.1/pre-migration.py
new file mode 100644
index 00000000..0d6b8ea7
--- /dev/null
+++ b/l10n_us_hr_payroll_401k/migrations/13.0.0.0.1/pre-migration.py
@@ -0,0 +1,22 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+import odoo
+
+
+def migrate(cr, version):
+    """
+    Salary Rules can be archived by Odoo S.A. during migration.
+    This leaves them archived after the migration, and even un-archiving them
+    is not enough because they will then be pointed to a "migrated" structure.
+    """
+    env = odoo.api.Environment(cr, odoo.SUPERUSER_ID, {})
+    xml_refs = env['ir.model.data'].search([
+        ('module', '=', 'l10n_us_hr_payroll_401k'),
+        ('model', '=', 'hr.salary.rule'),
+    ])
+    # I don't know why Odoo makes these non-updatable...
+    xml_refs.write({'noupdate': False})
+
+    rule_ids = xml_refs.mapped('res_id')
+    rules = env['hr.salary.rule'].browse(rule_ids)
+    rules.write({'active': True})