Ahmed Hegazi has completed a permanent move to West Bromwich Albion.
The 26 year old defender joined the club on loan in the summer and has impressed in Albion's defence.
He has signed until 2022 for a deal believed to be worth £4.5m.
"I am very happy with the Club and very happy to be part of this group of players," he told the club's website.
"I know the results are not what we would want at the moment. But there is great spirit here and I am sure that we will turn the results in our favour before long."