diff --git a/include/image-commands.mk b/include/image-commands.mk
index 0f292d15ee..7d9f93fed7 100644
--- a/include/image-commands.mk
+++ b/include/image-commands.mk
@@ -389,10 +389,17 @@ define Build/kernel-bin
 endef
 
 define Build/linksys-image
-	$(TOPDIR)/scripts/linksys-image.sh \
+	let \
+		size="$$(stat -c%s $@)" \
+		pad="$(call exp_units,$(PAGESIZE))" \
+		offset="256" \
+		pad="(pad - ((size + offset) % pad)) % pad"; \
+		dd if=/dev/zero bs=$$pad count=1 | tr '\000' '\377' >> $@
+	printf ".LINKSYS.01000409%-15s%08X%-8s%-16s" \
 		"$(call param_get_default,type,$(1),$(DEVICE_NAME))" \
-		$@ $@.new
-		mv $@.new $@
+		"$$(cksum $@ | cut -d ' ' -f1)" \
+		"0" "K0000000F0246434" >> $@
+	dd if=/dev/zero bs=192 count=1 >> $@
 endef
 
 define Build/lzma
diff --git a/scripts/linksys-image.sh b/scripts/linksys-image.sh
deleted file mode 100755
index d251b5da8e..0000000000
--- a/scripts/linksys-image.sh
+++ /dev/null
@@ -1,64 +0,0 @@
-#!/bin/sh
-#
-# Copyright (C) 2018 Oceanic Systems (UK) Ltd
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-# Maintained by: Ryan Pannell <ryan [at] o s u k l .com> <github.com/Escalion>
-#
-# Write Linksys signature for factory image
-# This is appended to the factory image and is tested by the Linksys Upgrader - as observed in civic.
-# The footer is 256 bytes. The format is:
-#  .LINKSYS.        This is detected by the Linksys upgrader before continuing with upgrade. (9 bytes)
-#  <VERSION>        The version number of upgrade. Not checked so use arbitrary value (8 bytes)
-#  <TYPE>           Model of target device, padded (0x20) to (15 bytes)
-#  <CRC>      	    CRC checksum of the image to flash (8 byte)
-#  <padding>	    Padding ('0' + 0x20 *7) (8 bytes)
-#  <signature>	    Signature of signer. Not checked so use arbitrary value (16 bytes)
-#  <padding>        Padding (0x00) (192 bytes)
-
-## version history
-# * version 1: initial commit
-
-set -e
-
-ME="${0##*/}"
-
-usage() {
-	echo "Usage: $ME <type> <in filename>"
-	[ "$IMG_OUT" ] && rm -f "$IMG_OUT"
-	exit 1
-}
-
-[ "$#" -lt 3 ] && usage
-
-TYPE=$1
-
-tmpdir="$( mktemp -d 2> /dev/null )"
-if [ -z "$tmpdir" ]; then
-	# try OSX signature
-	tmpdir="$( mktemp -t 'ubitmp' -d )"
-fi
-
-if [ -z "$tmpdir" ]; then
-	exit 1
-fi
-
-trap "rm -rf $tmpdir" EXIT
-
-IMG_TMP_OUT="${tmpdir}/out"
-
-IMG_IN=$2
-IMG_OUT="${IMG_IN}.new"
-
-[ ! -f "$IMG_IN" ] && echo "$ME: Not a valid image: $IMG_IN" && usage
-
-dd if="${IMG_IN}" of="${IMG_TMP_OUT}"
-CRC=$(printf "%08X" $(dd if="${IMG_IN}" bs=$(stat -c%s "${IMG_IN}") count=1|cksum| cut -d ' ' -f1))
-
-printf ".LINKSYS.01000409%-15s%-8s%-8s%-16s" "${TYPE}" "${CRC}" "0" "K0000000F0246434" >> "${IMG_TMP_OUT}"
-
-dd if=/dev/zero bs=1 count=192 conv=notrunc >> "${IMG_TMP_OUT}"
-
-cp "${IMG_TMP_OUT}" "${IMG_OUT}"