Akos Buzsaky is set to be sidelined for up to five weeks after QPR confirmed he requires knee surgery.
The Hungary international picked up the problem during a goalless draw with Norwich on 16th October.
It has now been decided that he will go under the knife in order to repair the damage, with it hoped that he will be back in plenty of time for the busy festive period.
"Unfortunately Akos has got a small tear in a knee cartilage," Rangers physio Nigel Cox told the club's official website.
"We hoped he would be able to get away with the need for surgery but, in order to ascertain whether that could happen we needed to give the knee time to settle down.
"It has become apparent that he is in too much discomfort. The only option now is surgery to clean up the knee.
"Unfortunately, where the injury is in his knee means the surgeon wants him to take his recovery very carefully so we are looking at four to five weeks of rehab."