Tuesday’s release of AC/DC‘s new album, Rock or Bust, is their first without founding member and rhythm guitarist Malcolm Young. When dementia got the best of him, his brother Angus turned to their nephew, Stevie Young, the son of their oldest brother, Stephen. Stevie, who is only three years younger than Malcolm and a year younger than Angus, filled in for his Uncle Mal on the band’s 1988 tour when he entered rehab for drinking.

Angus tells us Stevie was the natural choice, not only for his guitar playing, but he is also a songwriter and a producer. But before he accepted the job, he flew from his home in England to Australia to get Mal’s blessing. “He just wanted to make sure Mal was comfortable with him being there,” says Angus. “Just to feel reassured.”

Malcolm now lives in a Sydney, Australia nursing home, where Angus says he is receiving great care. In addition to dementia, he also underwent operations on his lungs and heart since AC/DC wrapped up their Black Ice tour in 2010.