Andrew Shinnie has penned a new deal at Birmingham until 2018.
The midfielder, 26, has committed his future to Blues to become the latest player to sign up under Gary Rowett.
Clayton Donaldson, Demarai Gray, Paul Caddis and Jonathan Grounds have all inked new deals in recent weeks as Rowett looks to tie down key members of his squad.
Shinnie made 28 appearances for Birmingham in the Sky Bet Championship last season and has played 56 times, scoring five goals, since joining from Inverness in 2013.