diff --git a/backup-pm-home.sh b/backup-pm-home.sh
index 0590b12..5a6df95 100755
--- a/backup-pm-home.sh
+++ b/backup-pm-home.sh
@@ -1,11 +1,14 @@
 #!/bin/sh
 # 2021-11-10
 # revised 2022-01-06 for multiple devices
+# revised 2022-10-11 for varying hostnames
 
 set -e
 set -u
 
-eval "$(ssh pm-rndis cat /etc/deviceinfo)"
+DEVICEHOSTNAME=${1:-pm-usb0}
+
+eval "$(ssh ${DEVICEHOSTNAME} cat /etc/deviceinfo)"
 
 if [ -z "${deviceinfo_codename}" ]
 then
@@ -39,7 +42,7 @@ one_fs	1
 
 sync_first	1
 
-backup	user@pm-rndis:/home/user	./
+backup	user@${DEVICEHOSTNAME}:/home/user	./
 EOF
 
 rsnapshot -c ${rsnapshot_conf} sync