Australia's ABC News Online is reporting that the National Trust of Australia (NTA) plans to replace a plaque honouring former AC/DC frontman Bon Scott that was stolen from Fremantle Cemetery in Western Australia over the weekend.

It has taken 26 years for the gravesite of the late rocker to be listed as a heritage and cultural icon and only five months for the plaque to be stolen. (View photos of the grave: Photo#1, Photo#2, Photo#3.)

NTA spokesman Carl Haynes says it is WA's first contemporary listing and needs a plaque.

"We're talking to the cemeteries so in the very near future we'll arrange for them a replacement," he said.

But Doug Thorncroft, from the WA Bon Scott Fan Club, says that is little comfort for the AC/DC fans who made the discovery on what would have been Bon Scott's 60th birthday.

"We didn't notice it at first because there was a pile of love rocks on top of where it should have been, and then we moved them and noticed it was gone," he said.

"Everyone was at first disappointed but then a little bit agro."

Thorncroft says he cannot imagine who would do such a thing.

"It may be somebody that was, who had just a little bit too much to drink on the Saturday night and thought they'd get a souvenir, maybe they're a big fan or it could be somebody with a grudge," he said.

"But yes, it's just so hard to work out who would do such a stupid thing."

The theft has been reported to police.