diff --git a/configs/ci20_mmc_defconfig b/configs/ci20_mmc_defconfig
index 3fa93ac..063d7b2 100644
--- a/configs/ci20_mmc_defconfig
+++ b/configs/ci20_mmc_defconfig
@@ -28,6 +28,7 @@
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 # CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 # CONFIG_DM_WARN is not set