diff --git a/addons/account/account_move_line.py b/addons/account/account_move_line.py
index 043f365bac2..7acdb119a11 100644
--- a/addons/account/account_move_line.py
+++ b/addons/account/account_move_line.py
@@ -424,7 +424,7 @@ class account_move_line(osv.osv):
         'debit': fields.float('Debit', digits_compute=dp.get_precision('Account')),
         'credit': fields.float('Credit', digits_compute=dp.get_precision('Account')),
         'account_id': fields.many2one('account.account', 'Account', required=True, ondelete="cascade", domain=[('type','<>','view'), ('type', '<>', 'closed')], select=2),
-        'move_id': fields.many2one('account.move', 'Move', ondelete="cascade", help="The move of this entry line.", select=2),
+        'move_id': fields.many2one('account.move', 'Move', ondelete="cascade", help="The move of this entry line.", select=2, required=True),
         'narration': fields.related('move_id','narration', type='text', relation='account.move', string='Narration'),
         'ref': fields.char('Ref.', size=64),
         'statement_id': fields.many2one('account.bank.statement', 'Statement', help="The bank statement used for bank reconciliation", select=1),
@@ -917,6 +917,9 @@ class account_move_line(osv.osv):
             elif field == 'credit':
                 attrs.append('sum="Total credit"')
 
+            elif field == 'move_id':
+                attrs.append('required="False"')
+
             elif field == 'account_tax_id':
                 attrs.append('domain="[(\'parent_id\',\'=\',False)]"')
                 attrs.append("context=\"{'journal_id':journal_id}\"")