SEATTLE, Wash. – The National Labor Relations Board says Starbucks is violating U.S. labor law by withholding pay hikes and other benefits from stores that have voted to unionize.

The labor board’s Seattle office filed the complaint on Wednesday, August 24th.

It says the company violated labor laws by offering raises and benefits only to non-union stores.

Starbucks announced the $200 million in added worker pay and benefits in May after a series of meetings with workers around the country.

The complaint is based on charges filed by Workers United, the union trying to organize Starbucks’ 9,000 company-owned U.S. stores.

Last week, Starbucks asked the NLRB to halt union elections entirely, saying it has evidence that a regional office improperly coordinated with union officials.

A decision in that case is pending.