The British Prime Minister says the Brexit withdrawal bill will include a vote on whether to hold a second referendum.
It's one of a number of compromises in Theresa May's latest Brexit proposals.
She said the House of Commons has 'one last chance' to pass the withdrawal agreement.
The UK government says it will seek to conclude alternative arrangements to replace the backstop by December 2020 so that it never needs to be used.
However, the plan also includes a commitment that, should the backstop come into force, the British government will stay aligned with Northern Ireland.
During a speech in London today, Mrs May reiterated that she doesn't back a second referendum.
— UK Prime Minister (@10DowningStreet) May 21, 2019
However, she also suggested she recognises the "genuine and sincere" strength of feeling for a second vote among many MPs.
She observed: "The government will therefore include in the withdrawal agreement bill a requirement to vote on whether to hold a second referendum.
"To those MPs who want a second referendum to confirm the deal, you need a deal... so let it have its second reading, and then make your case to parliament."
The withdrawal agreement is due before the House of Commons again in two weeks.