Nikola Katic's goal booked Rangers' place in the next round of the Europa League qualifiers.
Rangers booked their place in the third qualifying round of the Europa League despite a 1-1 draw with Osijek on Thursday, winning 2-1 on aggregate.
Alfredo Morelos' goal in Croatia had given Steven Gerrard's men the advantage and a single Nikola Katic goal proved enough once more at Ibrox, even if a late Borna Barisic drive set up a tense finish.
Both sides struggled to truly test the goalkeepers in the first half, with most shots on target fired straight at Marko Malenica or Allan McGregor.