Chesterfield have agreed a deal to sign Middlesbrough defender Jonathan Grounds on loan.
The 23-year-old is expected to link up with the current League Two champions ahead of their trip to Exeter on Saturday.
Grounds, a product of the Boro youth system, will remain at the B2net Stadium for one month.
Grounds signed a professional contract with Middlesbrough in July 2007 and has made 37 first team appearances.
He has had previous loan spells with Norwich and Hibernian.