Connacht have made five changes for their European Challenge Cup quarter-final against Racing 92 in Galway on Saturday (20:00 BST).
The province got the better of fellow United Rugby Championship (URC) side Cardiff in the last-16 stage last weekend without captain Cian Prendergast.
The blind-side flanker returns to the six jersey for the visit from the Top 14 outfit, with Josh Murphy moving back into the second row.
He will be partnered by former Bristol Bears lock Joe Joyce, who also missed the game against Cardiff.
Prop Denis Buckley starts at loose-head prop, while scrum-half Ben Murphy is fit again after finger surgery.
Shayne Bolton will miss out because of a quad strain with his place on the wing to be taken by Shane Jennings.
The visitors, who are 10th in the Top 14, have named former Saracens fly-half Owen Farrell on the bench.
Instead, former England Under-20s international Dan Lancaster will start at number 10.
Connacht: Hansen; Jennings, Gavin, Aki, Treacy; Hanrahan, B Murphy; Buckley, Heffernan, Bealham, J Murphy, Joyce, Prendergast (capt), Hurley-Langton, Jansen.
Replacements: Tierney-Martin, Dooley, Aungier, Dowling, Boyle, Devine, Ioane, Forde.
Racing 92: James; Naituvi, Habosi, Tuisova, Spring (capt); Lancaster, Le Garrec; Ben Arous, Escobar, Bamba, Palu, Rowlands, Baudonne, Kpoku, Joseph.
Replacements: Couly, Gogichashvili, Leota, R Taofifenua, Manyarara, D Taofifenua, Farrell, Chavancy.
