The group representing Australia's major sporting codes says the listing of cannabis as a performance enhancing drug is inconsistent.

The Coalition of Major and Professional Sports, which represents the AFL, NRL, Cricket Australia and Tennis Australia, is preparing to lobby the head of the World Anti Doping Agency (WADA) to take cannabis off the list of prohibited substances.

The head of the coalition Malcolm Speed says none of those sports tolerate cannabis use, but the drug should be treated differently under the anti doping code.

"If a player in any one of our codes was found to have used marijuana there's an automatic presumption that there'll be a two year ban," he said.

"What's happening around the world is that the two year bans aren't being applied because marijuana, cannabis, is seen as being in a different category of substances, so it's inconsistent it's anomalous.

"It's not performance enhancing so I think we are well and truly entitled to raise it with WADA and argue that it be taken away from the list."

But some are wary of the move.

Victoria's Chief Police Commissioner Ken Lay says he has some worries.

"I'd hate the message to go to the community that using cannabis is OK and appropriate and I'm sure the AFL will do the thinking about that, but that's the message that I'm really worried about," he said.

The most recent figures released by the AFL show just one player tested positive to marijuana in 2010.

The codes will meet officials from the World Anti-Doping Agency in Sydney on Wednesday.