Amazon founder Jeff Bezos wrote in a letter to shareholders saying that the company should “do a better job” for its workers just days after a vote failed to unionize one of the company’s fulfillment centers.

“I think we need to do a better job for our employees. While the voting results were lopsided and our direct relationship with employees is strong, it’s clear to me that we need a better vision for how we create value for employees — a vision for their success,” Bezos wrote in the letter Thursday.