A majority of workers at a Whole Foods Market store in Philadelphia voted to join the United Food and Commercial Workers International union, giving organized labor a new foothold at 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.

Workers at a Whole Foods Market in Pennsylvania have voted to unionize, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain.