McDonald's has walked out of negotiations to end zero-hour contracts, the union representing fast-food workers says.
Zero-hour contracts, where workers have to be available for work but have no hours guaranteed, have become common in the fast-food industry.
Burger King and the Restaurant Brands group have recently agreed to end the contracts.
National director of Unite Mike Treen said the union welcomed McDonald's offer on scrapping the contracts, but asked for more information.
He said as the latest talks ended without resolution, McDonald's staff would be striking on Friday.