Saracens have softened the blow of losing out on Soane Tonga'uiha by completing the signing of South Africa prop Deon Carstens.
Saracens had agreed a five-year deal with Tonga'uiha only for the Tongan prop to perform a U-turn and sign a new contract with Northampton.
However having come to an agreement with Saints that sees Tonga'uiha remain at Franklin's Gardens, Saracens have moved to sign Carstens from the Sharks.
The 30-year-old loosehead has made 80 appearances for the Natal-based franchise, while he has been capped eight times by the Springboks.
And Saracens director of rugby Brendan Venter is delighted to have signed a "world-class" front row.
"Sometimes in life things just seem to work in your favour - we are delighted to have signed Deon for next season," he said.
"More than a world-class loosehead on the field, he is also an outgoing and infectious character - exactly the kind of person who will enjoy and enhance the spirit within our squad."
The Cape Town-born Carstens is relishing the chance to be part of something special at Saracens.
He said: "Everybody in rugby can see there is something special happening at Saracens, and I'm looking forward to being part of it."