Frank Nouble has extended his stay with League 1 side Charlton Athletic until 7 May.
The 19-year-old has scored once in three appearance during his first month on loan at the south London club. Nouble is not the only Hammer out on loan with Olly Lee at fellow League One outfit Dagenham and Redbridge and Jordan Spence with Championship club Bristol City.
Kieron Dyer is due back at West Ham United on Monday after his month-long stay with Ipswich Town.