Boeing is being hit with its second strike in less than a year after 3,200 hourly workers walked off their jobs building military aircraft.

About 3,200 workers at Boeing facilities voted to reject a modified four-year labor agreement with Boeing, the International Association of Machinists and Aerospace Workers union said Sunday.

The rejected deal featured a 20% wage increase – 8% in the first year, and 4% percent each in years two through four for most union members.