Former France international Julien Bonnaire will join Lyon next season from Clermont on a two-year deal.
The veteran flanker will leave les Jaunards after eight seasons, moving to relegation strugglers Lyon.
The Pro D2 champions were beaten again yesterday in Montpellier, and currently sit bottom of the Top 14, six points adrift of safety.
However Bonnaire, 36, will join them for next season regardless of whether they stay up or not, as he looks to move closer to his family as he approaches the end of his career.
Bonnaire won 75 caps for France during a nine-year international career, and started the World Cup final in 2011.
He has also helped Clermont to their first ever Top 14 title in 2010.