Millwall have completed the permanent signing of Ahmet Brkovic from Luton on a free transfer.
The midfielder has been on loan at the Den since October and has now agreed an 18-month contract with the Lions.
Brkovic became a cult figure at Kenilworth Road after joining in 2001, with fans dubbing him the 'Croatian Sensation' following some spectacular goals.
However, the cash-strapped Hatters need him off the wage bill so Lions boss Kenny Jackett has stepped in.
Brkovic will be in the squad which travels to Port Vale on Saturday provided he recovers from a hamstring strain.