diff --git a/configs/spear320_usbtty_nand_defconfig b/configs/spear320_usbtty_nand_defconfig
index 4183171..14e6a12 100644
--- a/configs/spear320_usbtty_nand_defconfig
+++ b/configs/spear320_usbtty_nand_defconfig
@@ -21,6 +21,7 @@
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_I2C_DW=y