Singapore's Formula One Grand Prix street circuit will be slightly modified to increase the potential for overtaking, race promoters said in a statement received on Tuesday.
Ahead of the inaugural race here last September, drivers said the bumpy, five-kilometre (three-mile) waterfront circuit offered virtually no chance of overtaking, although organisers thought it was possible in at least two places.
Minor modifications are now proposed at three turns "in order to improve overtaking opportunities," said Michael McDonough, the race's technical and operations director.
This year's race will take place on September 27.
The changes come after consultations with the teams and the Federation Internationale de L'Automobile, the governing body for world motor sport.
Race promoters said there also would be some road surface improvements at three turns, while changes to the pit entry and exit areas will improve safety.