The use of the DRS overtaking device at the Eau Rouge corner at this weekend's Belgian Grand Prix has been banned by Formula One bosses.
The FIA are concerned that using the device at flat-out 180mph would become a safety risk.
Currently, the use of DRS is limited as drivers can only deploy it on a designated straight if they are less than one second behind the car in front.
The DRS system works by reducing a cars' downforce by 10% to increase the top speed.
Red Bull driver Mark Webber recently described the Eau Rouge corner as an "awesome challenge" in his BBC Sports Column.