New Zealand's acting prime minister has added let loose on his neighbours, claiming Australia copied their flag.
Asked about the matter this week, New Zealand Acting Prime Minister Winston Peters - whose party fiercely opposed a change - said Australia "copied" New Zealand.
"We had a flag that we've had for a long time, copied by Australia, and they should actually change their flag and honour the fact that we got there first with this design," he told TVNZ.
Technically, New Zealand adopted its Southern Cross-starred flag in 1902, while Australia formally only did so in 1954.
However, the Aussie national banner won a competition in 1901 and was flown in September that year during the first Flag Day.
It the past two weeks Mr Peters, Home Affairs Minister Peter Dutton and New Zealand's justice minister have traded barbs over the matter.