diff --git a/boards/nuvoton/npcm400f_evb/npcm400f_evb_defconfig b/boards/nuvoton/npcm400f_evb/npcm400f_evb_defconfig
index 009983fbc6a65a..3ca98aea216620 100644
--- a/boards/nuvoton/npcm400f_evb/npcm400f_evb_defconfig
+++ b/boards/nuvoton/npcm400f_evb/npcm400f_evb_defconfig
@@ -8,7 +8,6 @@ CONFIG_SRAM_VECTOR_TABLE=y
 CONFIG_BOOTLOADER_SRAM_SIZE=0
 # General Kernel Options
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=96000000
-# CONFIG_ROM_START_OFFSET=0x600
 CONFIG_XIP=n
 
 # CONFIG_ARM_MPU=y
diff --git a/soc/nuvoton/npcm/npcm4/Kconfig.defconfig b/soc/nuvoton/npcm/npcm4/Kconfig.defconfig
index 1e0e27c8c4258a..36e8052ba812d7 100644
--- a/soc/nuvoton/npcm/npcm4/Kconfig.defconfig
+++ b/soc/nuvoton/npcm/npcm4/Kconfig.defconfig
@@ -26,4 +26,8 @@ config FLASH_BASE_ADDRESS
 	  normally set by the board's defconfig file and the user should generally
 	  avoid modifying it via the menu configuration.
 
+config ROM_START_OFFSET
+	default 0x600 if XIP
+	default 0x0   if !XIP
+
 endif # SOC_SERIES_NPCM4