Danny Senda has extended his stay at Millwall by a further 18 months.
The former Wycombe defender initially joined the League One side on a six-month contract in the summer.
Lions boss Willie Donachie was keen to keep Senda beyond the end of January, when his deal was due to expire.
Senda is now tied to The Den until 2008 after pledging his future to the club.
"I'm delighted to be staying," Senda told the club's official website.
"There's a great bunch of lads here and my aim is to help us move up the table as quickly as possible."