diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig
index 2d9ffa4e9e..9153b04985 100644
--- a/src/soc/intel/cannonlake/Kconfig
+++ b/src/soc/intel/cannonlake/Kconfig
@@ -146,4 +146,8 @@ config VBOOT
 	select VBOOT_VBNV_CMOS
 	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
 
+config C_ENV_BOOTBLOCK_SIZE
+	hex
+	default 0x4000
+
 endif