Prime Minister Scott Morrison could be excused a little crankiness after his heavy itinerary of jet-setting and world-leader pleasantries.

But it wasn't China, or Labor, or the state of the global economy getting the PM's goat on Thursday, rather a dunny sign in a Canberra office building.

A sign at the restrooms of the DP&C offices in Canberra Chris Uhlmann/Twitter

Mr Morrison has hit out at a literal sign of the times in the Barton offices of his own Department of Prime Minister and Cabinet, which invites staff to "please use the bathroom that best fits your gender identity".

"You don't need to do this stuff," Mr Morrison told 2GB's Ben Fordham on Thursday afternoon.

"It's just political correctness over the top. It's just not necessary. I've got a clear view about this and I'm sure this will be sorted."

Toiletgate began with a tweet from the visiting Nine News political editor Chris Uhlmann, which predictably set off an online firestorm.

Mr Morrison told Mr Fordham he'd already spoken to incoming PM&C boss Phil Gaetjens about the sign and predicted it would not last long.

"Honestly, this is why we call it the Canberra bubble," the Prime Minister said. "It's ridiculous. It'll be sorted out. I've had a chat to the incoming head of Prime Minister and Cabinet, who's putting his feet under the desk on Monday ... I think people can work out which room to use."

The Prime Minister's intervention was slammed by Opposition Leader Anthony Albanese, who tweeted: "The PM doesn't have a plan to deal with cost of living going up, living standards going down and wages going nowhere – but he has a plan to deal with this bathroom sign in an office building. How is anyone meant to take this bloke seriously?"

The department refused to comment on whether any staff members had requested gender identity optional rest rooms.

However, its website proclaims it has a "range of strategies and initiatives to embed diversity and inclusion", which includes the LGBTIQ+ Network.

It also states it is a proud member of the Diversity Council of Australia, the Australian Network on Disability and Pride in Diversity.

Federal Vice President of the Liberal Party Teena McQueen took a slightly more measured tone with Mr Fordham.

"I think it's something [outgoing head] Martin Parkinson brought in and look, my experience in Canberra, each go to their assigned bathroom," she said. "But look I have nothing against it, but again I think it's a bit of overkill."

with Jenny Noyes