diff --git a/target/linux/octeon/base-files/lib/preinit/79_move_config b/target/linux/octeon/base-files/lib/preinit/79_move_config
index 6c34c18e74..02de715f5d 100644
--- a/target/linux/octeon/base-files/lib/preinit/79_move_config
+++ b/target/linux/octeon/base-files/lib/preinit/79_move_config
@@ -1,16 +1,27 @@
 # Copyright (C) 2014 OpenWrt.org
 
 move_config() {
-	. /lib/functions.sh
 	. /lib/upgrade/common.sh
 
+	local device="$1"
+	[ -n "$device" ] && [ -b "$device" ] && {
+		mount -t vfat "$device" /mnt
+		[ -f /mnt/sysupgrade.tgz ] && mv -f /mnt/sysupgrade.tgz /
+		umount /mnt
+	}
+}
+
+octeon_move_config() {
+	. /lib/functions.sh
+
 	case "$(board_name)" in
 		erlite)
-			mount -t vfat /dev/sda1 /mnt
-			[ -f /mnt/sysupgrade.tgz ] && mv -f /mnt/sysupgrade.tgz /
-			umount /mnt
+			move_config "/dev/sda1"
+			;;
+		itus,shield-router)
+			move_config "/dev/mmcblk1p1"
 			;;
 	esac
 }
 
-boot_hook_add preinit_mount_root move_config
+boot_hook_add preinit_mount_root octeon_move_config