diff --git a/addons/l10n_ch/invoice.py b/addons/l10n_ch/invoice.py
index 1057fc379fd..2bea9ba35b7 100644
--- a/addons/l10n_ch/invoice.py
+++ b/addons/l10n_ch/invoice.py
@@ -30,7 +30,7 @@
 #
 ##############################################################################
 
-from mx import DateTime
+from datetime import datetime
 
 from osv import fields, osv
 from tools import mod10r
@@ -71,8 +71,8 @@ class account_invoice(osv.osv):
             if invoice.move_id:
                 for line in invoice.move_id.line_id:
                     if not line.date_maturity or \
-                            DateTime.strptime(line.date_maturity, '%Y-%m-%d') \
-                            < DateTime.now():
+                            datetime.strptime(line.date_maturity, '%Y-%m-%d') \
+                            < datetime.today():
                         res[invoice.id] += line.amount_to_pay
         return res
 
diff --git a/addons/l10n_ch/wizard/create_dta.py b/addons/l10n_ch/wizard/create_dta.py
index d8cdec8c48a..94c623af13d 100644
--- a/addons/l10n_ch/wizard/create_dta.py
+++ b/addons/l10n_ch/wizard/create_dta.py
@@ -404,7 +404,7 @@ def _create_dta(obj, cr, uid, data, context=None):
         v['sequence'] = str(seq).rjust(5).replace(' ', '0')
         v['amount_to_pay']= str(pline.amount_currency).replace('.', ',')
         v['number'] = pline.name
-        v['currency'] = pline.currency.code
+        v['currency'] = pline.currency.symbol
 
         v['partner_bank_name'] =  pline.bank_id.bank.name or False
         v['partner_bank_clearing'] =  pline.bank_id.bank.clearing or False