diff --git a/contract/__manifest__.py b/contract/__manifest__.py
index e63b2fc2..038d8838 100644
--- a/contract/__manifest__.py
+++ b/contract/__manifest__.py
@@ -9,7 +9,7 @@
 
 {
     'name': 'Contracts Management - Recurring',
-    'version': '10.0.4.2.0',
+    'version': '10.0.4.2.1',
     'category': 'Contract Management',
     'license': 'AGPL-3',
     'author': "OpenERP SA, "
diff --git a/contract/models/account_analytic_account.py b/contract/models/account_analytic_account.py
index f5e5dd0a..ee0f6ee9 100644
--- a/contract/models/account_analytic_account.py
+++ b/contract/models/account_analytic_account.py
@@ -198,8 +198,8 @@ class AccountAnalyticAccount(models.Model):
         contract = line.analytic_account_id
         if 'old_date' in self.env.context and 'next_date' in self.env.context:
             lang_obj = self.env['res.lang']
-            lang = lang_obj.search(
-                [('code', '=', contract.partner_id.lang)])
+            code = contract.partner_id.lang or self.company_id.partner_id.lang
+            lang = lang_obj.search([('code', '=', code)])
             date_format = lang.date_format or '%m/%d/%Y'
             name = self._insert_markers(
                 line, self.env.context['old_date'],