Whole Foods workers in a Pennsylvania store vote to form the first union under Amazon ownership, joining a local chapter of the UFCW.

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.