on 7 july 2018, posavec returned to the croatian first football league, signing for hnk hajduk split on a one-year loan deal. posavec made his debut for hajduk on 26 july 2017 in a 1-0 victory over pfc slavia sofia in the second round of 2018-19 uefa europa league qualifying phase, earning plaudits for his performance. posavec made 33 appearances for hajduk in all competitions.