Birmingham have signed Hameur Bouazza on loan from Fulham until the end of the season.
The winger, 23, has been on loan at Championship rivals Charlton since August, where he scored a stunning goal against Blues in a 3-2 defeat at St Andrews earlier in the season.
Charlton were hopeful of keeping the Algeria international on board but Alex McLeish has moved to secure his services as the midlands club go in search of promotion to the Premier League.
The Blues boss said: "I've looked at him for a couple of years now and I had him on the radar at Rangers. I thought he was a promising young player; quick, direct, knows the English system and can do a job when team work is required.
"He has done very well at Charlton. It was made clear to me that there was a clause that would allow him to move in January. I know Charlton probably feel aggrieved at it but we've done nothing wrong."
McLeish has also revealed West Ham midfielder Lee Bowyer is contemplating a move to St Andrews after talks were held between both parties.
The 32-year-old, who almost joined Blues back in 2005 before rejecting a switch due to the complaints of a small section of the club's fans, is currently out of favour at Upton Park.
But McLeish is unconcerned by previous events and is confident the former England international could do a job for his side.
"I would have no qualms about bringing him into the set-up at Birmingham," added McLeish.
"I think he's probably learnt some harsh lessons in life. At the time he was probably a daft young boy."
He added: "We had talks with Lee and we're now waiting for an answer. I think he was pretty receptive with the plans I have for the team for the second half of the season and beyond. He's a player I've always admired.
"He's a bit of a dynamic player and I want to bring a dynamic look back to the team."
