Tolu Arokodare is developing well at Koln but he needs to refine his skills at the Bundesliga level, according to the club general manager Horst Heldt.
The 19-year-old striker joined Markus Gisdol's side on a season-long loan from Latvian club Valmiera in the summer and he has been involved in two league matches.
Arokodare made his Bundesliga debut as a 76th-minute substitute after replacing Sebastian Andersson in Koln's 1-0 defeat to Arminia Bielefeld on September 26.
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A week later, he was thrown into the fray in the 77th minute as Borussia Monchengladbach beat the Billy Goats 3-1.