The 30-year-old New Zealand-born forward initially joined in October on a deal until the end of the season.

Director of rugby Dean Richards was "delighted" the stay has been extended.

"He is a proven performer at the very highest level, he offers a lot to the side and his work around the breakdown and tackle area is absolutely top class," Richards added.

"It's great news that John sees his future with the Falcons, and it says a lot about the environment here that players of his quality are willing to sign."