France head coach Guy Novès has explained his thinking behind the selection of prop Jefferson Poirot ahead of Saturday.
The promising UBB prop made his Test debut in the win over Italy and has taken over from Eddy Ben Arous in the starting XV for this weekend.
Novès stated that the call was far from a "gamble" and that he and French forwards coach Yannick Bru had high expectations for the 23-year-old.
"It's not a gamble. It's something we have thought through," Novès told the Six Nations website.
"Jefferson was very good in the scrum against Italy which was what we expected. I'm not going to say he's better than the others because we all saw that we could have lost to Italy.
"Now, with Yannick (Bru), we are hoping to see him take another step, with more experience. We want to see if we can count on him for the future."
France have made five other changes to face Ireland, one of them being the promotion of Yacouba Camara to the number seven shirt.
Novès wants to see the Toulouse back-row make an impact not just with his defence but also over the ball at the breakdown.
"If we start with the idea that we have to fetchers, then it implies that we expect to defend a lot," added Novès.
"We would like to impose our own game to have a certain fluidity. Now we have to ask Yacouba to be even more efficient and fulfil his job as a fetcher. He has to step up a level."