The 22-year-old Cameroon striker has spent the week at St James' Park in a bid to win himself a contract.
Roeder: "The chairman and I are always talking and the very fact we are getting close to January means the topic of looking to add to the squad has been one of the main topics over the last seven to 10 days.
"There has not been a specific meeting, but we are talking about the possibility of adding to the squad."