Alasdair Dickinson has handed Edinburgh a derby boost ahead of the New Year's Day clash with Glasgow by signing a new two-and-a-half-year deal.
The 30-cap Scotland international prop rejoined the club on a one-year contract in May after leaving the Gunners in 2007 for a six-year spell with Gloucester and Sale.
But the 30-year-old has now taken a firm grasp of the number one shirt having missed just two matches so far this season.
"I'm delighted to extend my time here at Edinburgh," said Dickinson.
"It's my home club. I started my career here in the academy 10 years ago and I've really enjoyed it since I've come back.
"I firmly believe in what the coaches are building. There's a great group of lads here and I'm very happy to be part of the plans for a bright future.
"All the staff are so passionate about Edinburgh Rugby as a club and all the players are the same. We're all aiming in the right direction and I think we're really starting to generate that family feel.
"It's easier to get into a run when you play a lot of games and fortunately I've managed to do that this year. The important thing is to maintain that form for the club and the boys.
"I'm well aware that Wicus Blaauw is in and around the squad and is a quality player. It's that quality throughout the squad that drives everyone to perform every week, because if you don't someone else will take your place."