Graeme Murty has extended his loan spell from Reading to Charlton for a further month.
The experienced defender moved to The Valley in January and he has made four appearances for Phil Parkinson's side.
Charlton have moved to keep him at the club as they look to climb off the foot of the table.
Reading are happy to let him stay out on loan so that he can get some regular action under his belt.
Meanwhile, Danish pair Mikkel Jensen and Martin Christensen have both left Charlton.
Jensen has returned to former club Herfolge Boldklub, while Christensen has joined Lyngby on loan until the end of the season.