Ben Amos featured for Charlton as they went down by three goals to one away at Southend United on Tuesday afternoon.
The Shrimpers went ahead inside two minutes through Simon Cox, with them doubling their advantage in the 11th minute courtesy of a Michael Turner effort.
And although Ben Reeves made it 2-1 with 66 minutes on the clock, the home side put the result to bed with 11 minutes to go as Cox notched his second of the game.