An advocate for migrants is warning other Burger King workers could be unfairly punished, because of the ban put on the fast-food giant.

The chain has been barred from employing migrants for a year, after a manager was paid less than the minimum wage.

That is despite the fact the manager wasn't a migrant.

Migrant Workers Association spokeswoman Anu Kaloti told Mike Hosking five to 10 workers could have to leave the country because their visas are attached to Burger King.

"Employers who don't follow the law should be penalised or punished in some way but we have to be careful we don't punish the victims or the workers in the process."

LISTEN ABOVE AS ANU KALOTI SPEAKS WITH MIKE HOSKING