Stevenage have made their first signing of the January window with the capture of midfielder Jake Forster-Caskey.
The 28-year-old joins on a permanent deal. following in the footsteps of Alex Gilbey who arrived from The Valley on loan in the summer.
Forster-Caskey signed for Charlton in January 2017 and played 128 games for the Addicks, scoring 13 goals.
Prior to that he was with Brighton & Hove Albion.
Speaking on their website, Charlton manager Dean Holden said: "Jake has been here for six years now and has been a valuable player on and off the pitch for the club.
"I've had some good, honest conversations with him since I've come in to the club. His professionalism has been exemplary in that period.
"He wants to go and play games. He's missed time through serious injuries and he's at a period in his career where he needs to be playing regularly.
"Me and him had a good conversation and found a solution which suits Jake and suits the club as well. We wish him well."
The player will have to wait for his debut though as he is cup-tied and will be unavailable for Boro's FA Cup third-round trip to Aston Villa on Sunday.
He played for Charlton in their first round victory over Coalville Town as well as the second round replay defeat at Stockport County.
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