From the 1987–88 season, Mijatović became a regular at Budućnost under new head coach Stanko Poklepović. In October 1987, he was a member of the Yugoslav youth squad which competed in and won the 1987 FIFA World Youth Championship in Chile. Upon his return to Budućnost, Mijatović's spot on the squad was now cemented alongside Dejan Savićević, Dragoljub Brnović and Branko Brnović, who also represented Yugoslavia in Chile. Mijatović made 31 league appearances and contributed four goals as Budućnost finished the season in ninth position.