diff --git a/addons/account/invoice.py b/addons/account/invoice.py
index a751e3fb7fc..f094e1c5f3b 100644
--- a/addons/account/invoice.py
+++ b/addons/account/invoice.py
@@ -246,7 +246,7 @@ class account_invoice(osv.osv):
         'invoice_line': fields.one2many('account.invoice.line', 'invoice_id', 'Invoice Lines', readonly=True, states={'draft':[('readonly',False)]}),
         'tax_line': fields.one2many('account.invoice.tax', 'invoice_id', 'Tax Lines', readonly=True, states={'draft':[('readonly',False)]}),
 
-        'move_id': fields.many2one('account.move', 'Journal Entry', readonly=True, select=1, help="Link to the automatically generated Journal Items."),
+        'move_id': fields.many2one('account.move', 'Journal Entry', readonly=True, select=1, ondelete='restrict', help="Link to the automatically generated Journal Items."),
         'amount_untaxed': fields.function(_amount_all, method=True, digits_compute=dp.get_precision('Account'), string='Untaxed',
             store={
                 'account.invoice': (lambda self, cr, uid, ids, c={}: ids, ['invoice_line'], 20),