diff --git a/addons/account/models/account_invoice.py b/addons/account/models/account_invoice.py
index 99841241994..6be234335b5 100644
--- a/addons/account/models/account_invoice.py
+++ b/addons/account/models/account_invoice.py
@@ -1418,6 +1418,7 @@ class AccountInvoiceTax(models.Model):
     base = fields.Monetary(string='Base', compute='_compute_base_amount', store=True)
 
     # DO NOT FORWARD-PORT!!! ONLY FOR v10
+    @api.model
     def create(self, vals):
         inv_tax = super(AccountInvoiceTax, self).create(vals)
         # Workaround to make sure the tax amount is rounded to the currency precision since the ORM
diff --git a/odoo/report/report_sxw.py b/odoo/report/report_sxw.py
index e54ecad953e..6d0433db9fc 100644
--- a/odoo/report/report_sxw.py
+++ b/odoo/report/report_sxw.py
@@ -220,7 +220,8 @@ class rml_parse(object):
                 date = datetime(*value.timetuple()[:6])
             if date_time:
                 # Convert datetime values to the expected client/context timezone
-                record = self.env['base'].with_context(self.localcontext)
+                env = odoo.api.Environment(self.cr, self.uid, {})
+                record = env['base'].with_context(self.localcontext)
                 date = fields.Datetime.context_timestamp(record, date)
             return date.strftime(date_format.encode('utf-8'))