diff --git a/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig b/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
index a4be521c3c..e920627d54 100644
--- a/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
+++ b/boards/px4/fmu-v5x/nuttx-config/base_phy_DP83848C/defconfig
@@ -198,7 +198,6 @@ CONFIG_STM32F7_PHYSR_SPEED=0x2
 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