diff --git a/configs/zc5601_defconfig b/configs/zc5601_defconfig
index 17c5ce4..ba39357 100644
--- a/configs/zc5601_defconfig
+++ b/configs/zc5601_defconfig
@@ -36,6 +36,7 @@
 CONFIG_CMD_SF=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT4_WRITE=y
+CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y