Rockers AC/DC are delaying recording sessions for their next album after one of the bandmembers fell ill.

The group is keen to create the follow-up to 2008's "Black Ice," but singer Brian Johnson reveals their studio time has been put on hold to allow one of his bandmates to recover from a mystery illness.

Speaking on Florida radio's The Cowhead Show, Johnson, who does not name the bandmate affected, explains, "Hopefully this year we can get back together again. One of the boys is a little sick. I can't say anything, but he's getting better."

When asked by the presenter if the illness is terminal, Johnson adds, "No, but just bad. He's doing wonderful. Full recovery fully expected."