QPR have made their first move in the transfer market since the appointment of Paulo Sousa as their new first-team coach after landing striker Heidar Helguson on loan.
The Iceland striker, who scored the winner in his country's 1-0 friendly success over Malta on Wednesday evening, has joined the Championship club from Bolton Wanderers.
The 31-year-old has joined the R's until the end of January and could make his debut in Saturday's visit of former club Watford to Loftus Road.
Meanwhile, following Sousa's appointment on Wednesday, assistant manager Tim Flowers has left the club with immediate effect.
Flowers was brought to Loftus Road by former manager Iain Dowie in the summer.
"We would like to place on the record our thanks to Tim and wish him every success for the future," read a club statement.