diff --git a/files/initrd/opt/arc/arc-functions.sh b/files/initrd/opt/arc/arc-functions.sh
index 66b55a5c..df0733b0 100755
--- a/files/initrd/opt/arc/arc-functions.sh
+++ b/files/initrd/opt/arc/arc-functions.sh
@@ -1493,11 +1493,8 @@ function resetPassword() {
     for I in ${DSMROOTS}; do
       mount -t ext4 "${I}" "${TMP_PATH}/mdX"
       [ $? -ne 0 ] && continue
-      OLDPASSWD="$(cat "${TMP_PATH}/mdX/etc/shadow" 2>/dev/null | grep "^${USER}:" | awk -F ':' '{print $2}')"
-      if [ -n "${NEWPASSWD}" -a -n "${OLDPASSWD}" ]; then
-        sed -i "s|${OLDPASSWD}|${NEWPASSWD}|g" "${TMP_PATH}/mdX/etc/shadow"
-        sed -i "/^${USER}:/ s/\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\):\([^:]*\)/\1:\2:\3:\4:\5:\6:\7::\9/" "${TMP_PATH}/mdX/etc/shadow"
-      fi
+      sed -i "s|^${USER}:[^:]*|${USER}:${NEWPASSWD}|" "${TMP_PATH}/mdX/etc/shadow"
+      sed -i "/^${USER}:/ s/^\(${USER}:[^:]*:[^:]*:[^:]*:[^:]*:[^:]*:[^:]*:\)[^:]*:/\1:/" "${TMP_PATH}/mdX/etc/shadow"
       sed -i "s|status=on|status=off|g" "${TMP_PATH}/mdX/usr/syno/etc/packages/SecureSignIn/preference/${USER}/method.config" 2>/dev/null
       sync
       umount "${TMP_PATH}/mdX"