diff --git a/files/initrd/opt/arc/ramdisk-patch.sh b/files/initrd/opt/arc/ramdisk-patch.sh
index 08db958c..2599718c 100755
--- a/files/initrd/opt/arc/ramdisk-patch.sh
+++ b/files/initrd/opt/arc/ramdisk-patch.sh
@@ -25,7 +25,7 @@ mkdir -p "${RAMDISK_PATH}"
 # Read Model Data
 MODEL="$(readConfigKey "model" "${USER_CONFIG_FILE}")"
 LKM="$(readConfigKey "lkm" "${USER_CONFIG_FILE}")"
-SN="$(readConfigKey "sn" "${USER_CONFIG_FILE}")"
+SN="$(readConfigKey "arc.sn" "${USER_CONFIG_FILE}")"
 LAYOUT="$(readConfigKey "layout" "${USER_CONFIG_FILE}")"
 KEYMAP="$(readConfigKey "keymap" "${USER_CONFIG_FILE}")"
 PLATFORM="$(readModelKey "${MODEL}" "platform")"