Acclaimed record producer Keith Olsen, best remembered for his work alongside Fleetwood Mac and other notable rock bands, has died. He had FTD.

An award-winning producer, Olsen’s work on Fleetwood Mac’s 1975 self-titled album and the band’s resulting success made him one of the most in-demand producers in music. He worked with many high profile artists over the course of his career, including the Grateful Dead, Foreigner, Pat Benatar, Sammy Hagar and Ozzy Osbourne.

The Scorpions, a rock band that worked with Olsen, were among the first to report his death. His age and cause of death have not been revealed.