Derby have raided Championship rivals Sheffield United for Alan Wright.
The veteran defender has signed a one-month loan deal at Pride Park.
Wright has struggled to break into the United side this season after recovering from a cruciate knee ligament injury.
The former Blackburn and Aston Villa man has made only nine appearances this season and is behind David Unsworth in the pecking order at Bramall Lane.
Wright is expected to go straight into the Derby squad for this weekend's clash with Plymouth.