Earlier Genk won the first leg.
Sint-Truiden was quick off the mark. Sidibe opened the scoring for the home eleven in the 7th minute.
But then there was a rapid succession of Genk goals. Ogunjimi equalised, while Barda took the visitors into the lead just before half time.
In the second half Buffel put Genk in a commanding 3 - 1 lead. Onana managed to save Sint-Truiden from humiliation taking the final score to 3 - 2.