diff --git a/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig b/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
index ef63a04261..4aa91f528b 100644
--- a/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v6x/nuttx-config/nsh/defconfig
@@ -202,6 +202,7 @@ CONFIG_STM32H7_PHYSR_MODE=0x10
 CONFIG_STM32H7_PHYSR_SPEED=0x8
 CONFIG_STM32H7_PROGMEM=y
 CONFIG_STM32H7_RTC=y
+CONFIG_STM32H7_RTC_AUTO_LSECLOCK_START_DRV_CAPABILITY=y
 CONFIG_STM32H7_RTC_MAGIC_REG=1
 CONFIG_STM32H7_SAVE_CRASHDUMP=y
 CONFIG_STM32H7_SDMMC2=y