diff --git a/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig b/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
index 283eda0173c..c790f4a3cf2 100644
--- a/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v5x/nuttx-config/nsh/defconfig
@@ -199,7 +199,6 @@ CONFIG_STM32F7_PHYSR_SPEED=0x8
 CONFIG_STM32F7_PROGMEM=y
 CONFIG_STM32F7_PWR=y
 CONFIG_STM32F7_RTC=y
-CONFIG_STM32F7_RTC_HSECLOCK=y
 CONFIG_STM32F7_RTC_MAGIC_REG=1
 CONFIG_STM32F7_SAVE_CRASHDUMP=y
 CONFIG_STM32F7_SDMMC2=y