diff --git a/addons/account/account_bank_statement.py b/addons/account/account_bank_statement.py
index 5601179e0fc..a320f6de41d 100644
--- a/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@ -127,6 +127,7 @@ class account_bank_statement(osv.osv):
     _order = "date desc, id desc"
     _name = "account.bank.statement"
     _description = "Bank Statement"
+    _inherit = ['mail.thread']
     _columns = {
         'name': fields.char('Name', size=64, required=True, states={'draft': [('readonly', False)]}, readonly=True, help='if you give the Name other then /, its created Accounting Entries Move will be with same name as statement name. This allows the statement entries to have the same references than the statement itself'), # readonly for account_cash_statement
         'date': fields.date('Date', required=True, states={'confirm': [('readonly', True)]}, select=True),