Peter Frampton says he’s doing a farewell tour because he’s got a rare incurable muscular disease that may leave him unable to play guitar.

Frampton tells “CBS This Morning: Saturday” he’s been recording as much as he can since he was diagnosed with inclusion body myositis.

He says he was diagnosed three and a half years ago after a fall on stage.

He says stairs are the hardest for him so far, and he’s already feeling the effects in his fingers.

He’s participating in a drug trial at Johns Hopkins University.

Frampton says if it works, there will be a “miracle tour.”

If not, he says he started playing guitar when he was eight and now he’s 68, so he’s “had a very good run.”

Frampton’s farewell tour includes two Canadian dates: July 5th in Montreal and July 13th in Stayner, Ontario.