Harlequins have signed second row Irne Herbst from Italian side Benetton for next season.
The 29-year-old South African has spent the last five years with the United Rugby Championship club.
"I'm delighted to have signed with Harlequins," he told the club's website.
"To join such a prestigious team within English rugby and the current Premiership champions is a fantastic opportunity."
Quins are third in the Premiership and need one win from their final two games, against Gloucester or Exeter, to guarantee a place in the end-of-season play-offs.