Manase Manuokafoa has pledged his future to Bradford after signing a new two-year contract.
The 28-year-old prop joined the Bulls from Parramatta on an initial 12-month deal last year and agreed a two-year extension to his contract in December.
The deal featured a clause enabling him to leave the club at the end of this season, but the Tonga international has now committed to the club until the end of 2015.
"I want to be a part of the Bulls moving forward under Franny and that's why I've signed for another two years," said Manuokafoa, who is expected to be in Tonga's squad for this year's World Cup.
"There are a lot of very good homegrown players at the club and it's up to the senior players such as myself to help them come through.
"I'm just very happy to extend my stay at Bradford. My wife, my son and I love it here. We love the club and are very settled in the area."
Bradford coach Francis Cummins said: "You need a strong pack to take you forward and to bring in other people such as Garreth (Carvell) is great but Nas is very important for us too.
"He's improved again this year despite the setback of breaking his thumb. But he had a good off-season and I reckon he's going to be even better next year too."