Jonathan Spector is back for Birmingham after the defender returned to full training for the first time since October.
Spector has been sidelined with a torn thigh muscle and while Boxing Day's visit of Derby may come too soon he will be soon be available for boss Gary Rowett.
Gavin Gunning and Matt Smith (both knee) are still long-term absentees for Blues.
Will Packwood is also sidelined with a groin injury he picked up on loan at Colchester.
Derby head into one of the busiest times of the season with...