diff --git a/invoice.py b/invoice.py
index 30590dca42..31a23946e0 100644
--- a/invoice.py
+++ b/invoice.py
@@ -3,8 +3,6 @@
 "Invoice"
 
 from trytond.osv import fields, OSV
-import datetime
-import mx.DateTime
 from decimal import Decimal
 from trytond.netsvc import LocalService
 from trytond.report import Report
diff --git a/payment_term.py b/payment_term.py
index 55848586b3..92e9494022 100644
--- a/payment_term.py
+++ b/payment_term.py
@@ -4,6 +4,8 @@
 from trytond.osv import fields, OSV
 from trytond.sql_db import table_handler
 from decimal import Decimal
+import datetime
+import mx.DateTime
 
 
 class PaymentTerm(OSV):