Just days after the announcement that a middleweight title fight between champion Chris Weidman and Lyoto Machida was being shifted from UFC 173 to UFC 175 due to injury, the promotion has revealed a new headliner for its May 24 event.

UFC bantamweight champion Renan Barao will put his 135-pound strap on the line against T.J. Dillashaw in the new UFC 173 main event.

The Brazilian Barao enters the contest on the heels of a first-round stoppage of Urijah Faber at UFC 169 in February. The 27-year-old carries a 32-fight unbeaten streak that dates back to 2005. Barao is a perfect 7-0 inside the Octagon, including three straight stoppages. The Nova Uniao fighter captured the promotion’s interim title in 2012 when former champion Dominick Cruz was sidelined with a knee injury. Barao defended the belt twice, besting Eddie Wineland and Michael McDonald. After the promotion stripped Cruz of the belt in early 2014, Barao was crowned the undisputed champion.

Dillashaw, meanwhile, has gone 5-1 inside the Octagon since falling short on The Ultimate Fighter 14. The Team Alpha Male product most recently edged Mike Easton at UFC Fight Night 35 in January. The 28-year-old was originally slated to face Takeya Mizugaki at the event, but will now challenge for UFC gold. Dillashaw will look to avenge the loss of his teammate and mentor Faber against the Brazilian. Six of Dillashaw’s nine career wins have come by finish, including three in the UFC.

UFC 173 takes place Saturday, May 24 from the MGM Grand Garden Arena in Las Vegas. The night’s main card will air live on pay-per-view.