Blackburn have signed South Africa international midfielder Elrio van Heerden on a free transfer from Belgian side Club Brugge.
The 25-year-old, who began his career in Denmark with FC Copenhagen, has signed a two-year deal with Rovers.
Capped 25 times by South Africa, Van Heerden is currently with the Bafana Bafana squad preparing for the Confederations Cup.
“We’ve signed a very talented young man, I think it is a great addition,” Allardyce told the Blackburn official club website.
“He’s had a couple of injuries which have been hiding his talents for a while, but we’ve monitored him over the last few months.
“He was here on Monday and flew through our Premier League standard tests.”