NSW winger Josh Addo-Carr has joined Blues teammate Cody Walker in vowing not to sing the Australian national anthem before next Wednesday's first State of Origin match in Brisbane, saying it does not represent the country's Indigenous people.

New NSW five-eighth Walker will stand silently when Advance Australia Fair is played before a sold-out Suncorp Stadium and Addo-Carr said on Wednesday he would proudly do the same.

Making a stand: NSW winger Josh Addo-Carr. Credit:NRL Photos

"I respect what he said," Addo-Carr said of Walker. "We are Australians too. Indigenous people were the first people here, on the land.

"I have full support of Cody’s decision and I will be behind him all the way."