"I've spoken to Sunderland caretaker manager Ricky Sbragia. He's happy for him to stay," he told BBC London 94.9.
"He'll only get better the more he plays. His attitude alone will get him a good career in this game: not only has he got a good attitude and work ethic, he's got great ability as well."
Waghorn has made two starts and a substitute appearance for the Addicks, who are currently second from bottom of the Championship table.
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