Harlequins have opted to bring back Julien Rinaldi to The Stoop after re-signing him for 2012 from Wakefield on a two-year contract.
The 32-year-old French hooker played 48 games in two seasons with Quins in 2007 and 2008.
But the club were forced to release him due to tighter regulations on foreign players from the Rugby Football League.
Rinaldio returned to Super League last season after agreeing a short-term deal with Wakefield, extended to 2011.
In the mean time, he returned to his own country to become player-coach of his home town club, Villeneuve Leopards.
"It's great to have Julien back on board," said Quins coach Rob Powell.
"He left the club in 2008 more due to an RFL ruling than anything else.
"He's been exceptional for Wakefield this year and will provide strike out of dummy half with his running, passing and kicking game."
Wakefield chief executive James Elston added: "Julien has been a great servant to the club and, on behalf of everyone at the Wildcats I would like to wish him every success in London.
"He will continue to play at Wakefield until the end of the season and will then join Harlequins next season."