Montpellier have completed the signing of Lions prop Justin Ackerman as cover for the injured Antoine Guillamon.
The 25-year-old joins from South African side Golden Lions to fill in for Guillamon, who is expected to be sidelined for between six weeks and three months following a groin operation.
Ackerman could make his debut away to Glasgow in the European Champions Cup on Friday.
Both sides lost their opening two matches and are in desperate need of a victory to retain any hope of reaching the quarterfinals.