Millwall have signed French forward Dany N'Guessan from Leicester City in a permanent deal for an undisclosed fee.
The 24-year-old, who started a six-month loan spell at the Den in August, has agreed terms on a three-year deal.
N'Guessan joined the Foxes in June 2009 from Lincoln City and had spells on loan at Scunthorpe United and Southampton last season.
Meanwhile, Leicester youngster Shane Byrne has joined Bury on a one-month loan deal.
Byrne, 18, withdrew from international duty with Republic of Ireland Under-19s to join up with the Shakers before the transfer deadline.