Bassist Jean-Yves “Blacky” Thériault has left the band Voivod for “personal reasons,” according to an official post today on the band’s Facebook page.

The announcement states that the 51-year-old bassist will no longer be performing live with the Canadian thrash metal outfit he co-founded back in 1982 and that he has left the band entirely. Blacky first quit Voivod after the release of their 1991 album Angel Rat, but returned to the fold in 2008 and was on their latest effort, 2013’s Target Earth.