Sepang will continue to host MotoGP's Malaysian Grand Prix until at least 2021.
The latest venue to secure a contract extension in 2016, Sepang's new deal covers the next five seasons.
The then-freshly-built circuit joined the calendar as the new Malaysian GP host in 1999, following Shah Alam between '91-97 and Johor in '98.
Sepang will host pre-season testing on January 30-February 1 next year, and its round of the 2017 MotoGP season on October 27-29.
"We have been here since 1999 and it has been a long road together," Carmelo Ezpeleta, CEO of MotoGP Dorna, said.
"We're extremely proud of the Malaysian GP, the increasing spectator numbers and the incredible spectacle.
"We are proud to renew for at least these five years."