The EU should agree that no final Brexit settlement can be signed off if it's opposed by Ireland, Brian Hayes has warned.
Under the current rules the Brexit deal could be voted through by a qualified majority vote of the European Council - made up of heads of governments.
Unless that changes Ireland could be "railroaded by other member states into something that is not on our national interests," he said.
The Fine Gael MEP said it would be a disaster for Ireland if a Brexit agreement was concluded despite Irish opposition.
He said it's likely to be a decade before the Brexit process is finally concluded.
He was speaking at the British Irish Chamber of Commerce annual conference in Dublin.