Bristol City have extended the loan deal of Millwall defender Karleigh Osborne until 5 January.
The 25-year-old centre-back joined the League One club on an initial one-month loan at the start of November.
He made his debut in the 2-0 win over Crawley and has played three further games for Sean O'Driscoll's side.
Osborne began his career at Brentford, making 212 appearances for the Bees before leaving to join Millwall in the summer of 2012.
He made 16 appearances last season and played once for the Lions at the start of this term, prior to his loan move to Ashton Gate.
Millwall have a 24-hour recall option as part of the deal with City.