diff --git a/drivers/mpsl/flash_sync/Kconfig b/drivers/mpsl/flash_sync/Kconfig
index 125d8088127..2eaad28b227 100644
--- a/drivers/mpsl/flash_sync/Kconfig
+++ b/drivers/mpsl/flash_sync/Kconfig
@@ -42,6 +42,7 @@ config SOC_FLASH_NRF_RADIO_SYNC_MPSL_NORMAL_PRIORITY_TIMEOUT_US
 	int "Timeout for normal priority MPSL request [us]"
 	depends on SOC_FLASH_NRF_RADIO_SYNC_MPSL
 	range 0 1000000
+	default 5000 if BT_MESH
 	default 10000
 	help
 	  The flash synchronization mechanism relies on MPSL timeslots.