The striker scored his side's winner in the 2-1 win over Tottenham, and the Denmark international's future at the club has been speculated on of late due to his bit-part use by Wenger.
However, talk of another loan move for the 19-year-old was given the short shrift by the French tactician.
"Nicklas is here for four more years and we want to keep him," said Wenger unequivocally in the Sunday Mirror.
"Nowhere else in the world do you have so many young players in a club. He is only 19 and he is good enough to have a long-term future here.