Of course, the modern-day Muslim apologetic denial of this comes in the form of blaming "early Jewish converts to Islam". That's right; just like the Nazis, when all else fails, blame it on those nasty Jooooos.
From Al-Tabari, Vol. 2, p. 11, p. 11:
Shem, the son of Noah was the father of the Arabs, the Persians, and the Greeks; Ham was the father of the Black Africans; and Japheth was the father of the Turks and of Gog and Magog who were cousins of the Turks. Noah prayed that the prophets and apostles would be descended from Shem and kings would be from Japheth. He [Noah] prayed that the African’s color would change so that their descendants would be slaves to the Arabs and Turks.