diff --git a/boards/auterion/fmu-v6s/nuttx-config/nsh/defconfig b/boards/auterion/fmu-v6s/nuttx-config/nsh/defconfig
index 619fd2b618..8dacaf564c 100644
--- a/boards/auterion/fmu-v6s/nuttx-config/nsh/defconfig
+++ b/boards/auterion/fmu-v6s/nuttx-config/nsh/defconfig
@@ -225,8 +225,10 @@ CONFIG_STM32H7_NO_PHY=y
 CONFIG_STM32H7_PHY_POLLING=y
 CONFIG_STM32H7_PROGMEM=y
 CONFIG_STM32H7_RTC=y
-CONFIG_STM32H7_RTC_AUTO_LSECLOCK_START_DRV_CAPABILITY=y
+CONFIG_STM32H7_RTC_HSECLOCK=y
 CONFIG_STM32H7_RTC_MAGIC_REG=1
+CONFIG_STM32H7_RTC_MAGIC=0xA5A5A5A5
+CONFIG_STM32H7_RTC_MAGIC_TIME_SET=0xA6A6A6A6
 CONFIG_STM32H7_SAVE_CRASHDUMP=y
 CONFIG_STM32H7_SERIALBRK_BSDCOMPAT=y
 CONFIG_STM32H7_SERIAL_DISABLE_REORDERING=y