Rudd, 60, is under house arrest at his New Zealand home after being accused of threatening to kill and possession of drugs. The charge of attempting to procure the murder of two men was dropped for lack of evidence - but he could still face up to seven years in jail.

The band have reported that he'd been behaving erratically in the run-up to his legal woes. Guitarist Angus Young has said it was difficult to keep him at work while they recorded upcoming album Rock Or Bust, and that he failed to appear for a London video shoot without warning.

Now Johnson tells Howard Stern on SiriusXM: "I don't think we have to do anything - fire him or anything like that. I think the situation is going to take care of itself.