diff --git a/addons/account/account.py b/addons/account/account.py
index dd9e869ae4a..5d1916ee7bd 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -1383,6 +1383,7 @@ class account_move(osv.osv):
                         'ref':False,
                         'balance':False,
                         'account_tax_id':False,
+                        'statement_id': False,
                     })
 
             if 'journal_id' in vals and vals.get('journal_id', False):
@@ -1419,6 +1420,7 @@ class account_move(osv.osv):
         context = {} if context is None else context.copy()
         default.update({
             'state':'draft',
+            'ref': False,
             'name':'/',
         })
         context.update({