diff --git a/sixteen_in_fourteen/__init__.py b/sixteen_in_fourteen/__init__.py
index 2d9a1d69..69621bde 100644
--- a/sixteen_in_fourteen/__init__.py
+++ b/sixteen_in_fourteen/__init__.py
@@ -1,7 +1,13 @@
+# Copyright 2024 Akretion (http://www.akretion.com).
+# @author Florian Mounier <florian.mounier@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
 import sys
 import importlib
 from contextlib import contextmanager
 
+from . import models  # noqa: F401
+
 MOVED_MODULES = {
     "odoo.addons.sale.models.sale_order_line": "odoo.addons.sale.models.sale",
     "odoo.addons.sale.models.sale_order": "odoo.addons.sale.models.sale",
diff --git a/sixteen_in_fourteen/models/__init__.py b/sixteen_in_fourteen/models/__init__.py
new file mode 100644
index 00000000..0e444493
--- /dev/null
+++ b/sixteen_in_fourteen/models/__init__.py
@@ -0,0 +1 @@
+from . import base
diff --git a/sixteen_in_fourteen/models/base.py b/sixteen_in_fourteen/models/base.py
new file mode 100644
index 00000000..626ab7cb
--- /dev/null
+++ b/sixteen_in_fourteen/models/base.py
@@ -0,0 +1,58 @@
+# Copyright 2024 Akretion (http://www.akretion.com).
+# @author Florian Mounier <florian.mounier@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+# Backport is part of Odoo. See LICENSE file for full copyright and licensing details.
+
+
+from odoo import api, models
+
+
+class Base(models.AbstractModel):
+    _inherit = "base"
+
+    def _add_precomputed_values(self, vals_list):
+        """PARTIAL BACKPORT FROM ODOO 16
+
+        It backports the precompute feature on create but does not
+        do all sanity checks that are done in Odoo 16.
+        It does not work with inverse fields yet.
+
+        --
+
+        Add missing precomputed fields to ``vals_list`` values.
+        Only applies for precompute=True fields.
+
+        :param dict vals_list: list(dict) of create values
+        """
+        precomputable = {
+            fname: field
+            for fname, field in self._fields.items()
+            if getattr(field, "precompute", False) and not field.inverse
+        }
+        if not precomputable:
+            return
+
+        # determine which vals must be completed
+        vals_list_todo = [
+            vals
+            for vals in vals_list
+            if any(fname not in vals for fname in precomputable)
+        ]
+        if not vals_list_todo:
+            return
+
+        # create new records for the vals that must be completed
+        records = self.browse().concat(*(self.new(vals) for vals in vals_list_todo))
+
+        for record, vals in zip(records, vals_list_todo):
+            for fname, field in precomputable.items():
+                if fname not in vals:
+                    # computed stored fields with a column
+                    # have to be computed before create
+                    # s.t. required and constraints can be applied on those fields.
+                    vals[fname] = field.convert_to_write(record[fname], self)
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        self._add_precomputed_values(vals_list)
+        return super().create(vals_list)
diff --git a/sixteen_in_fourteen/odoo/http.py b/sixteen_in_fourteen/odoo/http.py
index 11f3ef56..e585ddc4 100644
--- a/sixteen_in_fourteen/odoo/http.py
+++ b/sixteen_in_fourteen/odoo/http.py
@@ -1,3 +1,5 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
 import collections.abc
 from abc import ABC, abstractmethod
 
diff --git a/sixteen_in_fourteen/odoo/tools/float_utils.py b/sixteen_in_fourteen/odoo/tools/float_utils.py
index 1533645b..ea33e98f 100644
--- a/sixteen_in_fourteen/odoo/tools/float_utils.py
+++ b/sixteen_in_fourteen/odoo/tools/float_utils.py
@@ -1,3 +1,5 @@
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
 from odoo.tools.float_utils import float_repr, float_round