Much of the debate over Boris Johnson's Brexit bill has focused on what happens at the end of the transition period -- the period running to December 2020 in which much of the status quo will remain in place.
It was designed to give the UK and the EU time to strike a trade deal and other agreements, but such pacts take years to negotiate and it's unlikely one can be reached so quickly.
That's why opposition MPs have been warning that the current deal could lead to, in essence, a no-deal Brexit in 14 months' time.
So Nick Boles, a leader in the ex-Tory, anti-no-deal brigade, has just announced he's tabled an amendment for debate later today seeking to force a government to automatically extend the transition period if it can't reach a deal in the intervening time (unless Parliament votes to the contrary).
The amendment follows hours of reported negotiations between Boles and his fellow independents and Downing Street.
And while it could mean those independents support Johnson's timetable, it could cost him favor with the hardline Tories on the other side who are keen to keep a no-deal split on the table in 2020 and beyond.