diff --git a/configs/nas220_defconfig b/configs/nas220_defconfig
index 9d42a03..75034d1 100644
--- a/configs/nas220_defconfig
+++ b/configs/nas220_defconfig
@@ -18,6 +18,7 @@
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_UBI=y
+CONFIG_ISO_PARTITION=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y