diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index f28ebc76210..cf17c76deff 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -986,9 +986,10 @@ class account_move_line(osv.osv):
             if 'period_id' in vals and 'period_id' not in context:
                 period_id = vals['period_id']
             elif 'journal_id' not in context and 'move_id' in vals:
-                m = self.pool.get('account.move').browse(cr, uid, vals['move_id'])
-                journal_id = m.journal_id.id
-                period_id = m.period_id.id
+                if vals['move_id']:
+                    m = self.pool.get('account.move').browse(cr, uid, vals['move_id'])
+                    journal_id = m.journal_id.id
+                    period_id = m.period_id.id
             else:
                 journal_id = context.get('journal_id',False)
                 period_id = context.get('period_id',False)