Bradley Dack scored for Gillingham from a header on 41 minutes and the score was levelled when Nicky Ajose scored a 90th-minute penalty for the Add1cks away at the MEMS Priestfield stadium.
Charlton players:
Rudd, Solly, Konsa, Pearce, Fox, Crofts, Ulvestad, Jackson (Ajose 46), Holmes, Lookman, Magennis (Novak 78).
