diff --git a/scripts/functions.sh b/scripts/functions.sh
index 9a7fcde627..ec0618c272 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -5,6 +5,19 @@ get_magic_word() {
 	dd if=$1 bs=4 count=1 2>/dev/null | od -A n -N 4 -t x1 | tr -d ' '
 }
 
+get_post_padding_word() {
+	local rootfs_length="$(stat -c%s "$1")"
+	[ "$rootfs_length" -ge 4 ] || return
+	rootfs_length=$((rootfs_length-4))
+
+	# the JFFS2 end marker must be on a 4K boundary (often 64K or 256K)
+	local unaligned_bytes=$((rootfs_length%4096))
+	[ "$unaligned_bytes" = 0 ] || return
+
+	# skip rootfs data except the potential EOF marker
+	dd if="$1" bs=1 skip="$rootfs_length" 2>/dev/null | od -A n -N 4 -t x1 | tr -d ' '
+}
+
 get_fs_type() {
 	local magic_word="$(get_magic_word "$1")"
 
@@ -13,7 +26,16 @@ get_fs_type() {
 		echo "ubifs"
 		;;
 	"68737173")
-		echo "squashfs"
+		local post_padding_word="$(get_post_padding_word "$1")"
+
+		case "$post_padding_word" in
+		"deadc0de")
+			echo "squashfs-jffs2"
+			;;
+		*)
+			echo "squashfs"
+			;;
+		esac
 		;;
 	*)
 		echo "unknown"