Defender Ryan Cresswell has agreed to join Rotherham after rejecting the chance to stay with Bury.
The 22-year-old centre-half will return to the Millers, where he enjoyed a successful loan spell in 2007, after the Lancashire club confirmed he has turned down the opportunity to stay at Gigg Lane.
Bury boss Alan Knill had hoped to keep the former Sheffield United man with the club.
But Cresswell becomes the third player to leave the Shakers this summer after Stephen Dawson and Brian Barry-Murphy also rejected new contracts.
A club statement read: "Ryan has agreed terms with Rotherham.
"He leaves us with our best wishes for the future and our sincere thanks for his two years service to Bury Football Club."
Cresswell will become the Millers' second summer signing, following hot on the heels of Marcus Marshall, who penned a contract last week.