diff --git a/configs/sama5d36ek_cmp_mmc_defconfig b/configs/sama5d36ek_cmp_mmc_defconfig
index 186f9f4..1c9148d 100644
--- a/configs/sama5d36ek_cmp_mmc_defconfig
+++ b/configs/sama5d36ek_cmp_mmc_defconfig
@@ -28,6 +28,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_BOOTP_BOOTPATH=y
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_HOSTNAME=y