diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index 94c4acf24aa..1282d199b80 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -1094,7 +1094,7 @@ class account_move_line(osv.osv):
     def _update_check(self, cr, uid, ids, context={}):
         done = {}
         for line in self.browse(cr, uid, ids, context):
-            if line.move_id.state <> 'draft':
+            if line.move_id.state <> 'draft' and (not line.journal_id.entry_posted):
                 raise osv.except_osv(_('Error !'), _('You can not do this modification on a confirmed entry ! Please note that you can just change some non important fields !'))
             if line.reconcile_id:
                 raise osv.except_osv(_('Error !'), _('You can not do this modification on a reconciled entry ! Please note that you can just change some non important fields !'))