diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index 13803d3ff79..dd749ba9820 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -559,6 +559,8 @@ class account_move_line(osv.osv):
         'state': 'draft',
         'currency_id': _get_currency,
         'journal_id': lambda self, cr, uid, c: c.get('journal_id', False),
+        'credit': 0.0,
+        'debit': 0.0,
         'account_id': lambda self, cr, uid, c: c.get('account_id', False),
         'period_id': lambda self, cr, uid, c: c.get('period_id', False),
         'company_id': lambda self, cr, uid, c: self.pool.get('res.company')._company_default_get(cr, uid, 'account.move.line', context=c)