Some 300 workers at an Amazon-owned Whole Foods store in Philadelphia have voted to unionize, mirroring a pro-union shift in public opinion, according to Gallup.

A majority of workers at a Whole Foods Market in Philadelphia voted in favor of joining the United Food and Commercial Workers International union, presenting a new foothold for organized labor within parent-company Amazon.

The union win, at a Philadelphia store where workers are seeking higher wages, comes as Amazon is also fighting organizing efforts among some warehouse employees and delivery drivers.