Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an uplink grant that schedules a sounding reference signal (SRS) transmission and a physical uplink shared channel (PUSCH) transmission and indicates one or more parameters for determining a cyclic prefix extension. The UE may determine the cyclic prefix extension based at least in part on the one or more parameters. The UE may transmit the SRS transmission with the cyclic prefix extension after performing a listen before talk (LBT) procedure. Numerous other aspects are provided.