Championship leaders Southampton have signed Celtic defender Jos Hooiveld for an undisclosed fee.
Hooiveld, 28, has been on loan at the Saints since August and has now tied up a three-and-a-half-year deal.
The Dutchman's loan was due to expire in January and the Saints were allowed to sign him outside the transfer window as they have his registration.
He told BBC Radio Solent: "The style of play suits my game. The atmosphere in the grounds is phenomenal."
The former AIK Solna man has formed a strong defensive partnership with Jose Fonte and says he is enjoying playing alongside the Portuguese.
"We clicked well from day one and we spend time together off the pitch as well," he added.
"We're both a bit older and played a lot of games.
"We know that if one of us has an off the game the other one needs to step up and it's been working well so far."