diff --git a/backup-zfs b/backup-zfs
index 0d1887a..b97b1d0 100755
--- a/backup-zfs
+++ b/backup-zfs
@@ -10,7 +10,7 @@ usage() {
 	  src          the source fs, specified as [host:]pool/path/to/fs
 	  dest         the destination fs parent, specified as [host:]pool/path/to/fs
 	               (the final path component of src will be appended to dest)
-
+	  -p           ssh port
 	  -h           help
 	  -v           verbose mode
 	  -q           quiet mode
@@ -53,10 +53,10 @@ ZFS() {
 	shift
 	if [[ -n $host ]] ; then
 		log "remote ($host): zfs $@"
-		ssh "$host" sudo zfs "$@"
+		ssh -C -p $port "$host" zfs "$@"
 	else
 		log "local: zfs $@"
-		sudo zfs "$@"
+		zfs "$@"
 	fi
 }
 
@@ -70,11 +70,12 @@ verbose=false
 quiet=false
 tossh=false
 fromssh=false
+port=22
 
 ###
 ### parse options
 ###
-while getopts "hvqk:t:d:srg:" opt ; do
+while getopts "hvqk:p:t:d:srg:" opt ; do
 	case $opt in
 		h) usage 0 ;;
 		v)
@@ -84,6 +85,7 @@ while getopts "hvqk:t:d:srg:" opt ; do
 			;;
 		q) quiet=true ;;
 		k) keep=$OPTARG ;;
+		p) port=$OPTARG ;;
 		t) tag=$OPTARG ;;
 		d) dateopts=$OPTARG ;;
 		s) tossh=true ;;
@@ -162,15 +164,15 @@ if $tossh ; then
 	# normal case: send incremental
 	else
 		log "sending $([[ -n $gpgid ]] && echo "encrypted ")incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
-		#ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
+		#ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
 		if [[ -n $gpgid ]] ; then
-			ZFS "$srchost" send $send_opts -R -I "$last" "$cur" \
+			ZFS "$srchost" send $send_opts -R -i "$last" "$cur" \
 				| gpg --trust-model always --encrypt --recipient "$gpgid" \
 				| ssh "$desthost" zfswrite "${tag}_$date.zfssnap.gpg" \
 				|| die $? "zfs incremental send failed"
 			ssh "$desthost" zfslast "$snap"
 		else
-			ZFS "$srchost" send $send_opts -R -I "$last" "$cur" \
+			ZFS "$srchost" send $send_opts -R -i "$last" "$cur" \
 				| ssh "$desthost" zfswrite "${tag}_$date.zfssnap" \
 				|| die $? "zfs incremental send failed"
 			ssh "$desthost" zfslast "$snap"
@@ -200,7 +202,7 @@ elif $fromssh ; then
 	### receive
 	###
 	log "receiving incremental snapshot from $src to $dest"
-	#ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
+	#ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
 	for file in $(ssh "$srchost" zfsfind | sort) ; do
 		log "receiving $file from $srchost"
 		if [[ $file =~ \.gpg$ ]] ; then
@@ -255,7 +257,7 @@ elif ! ZFS "$srchost" list $srcfs@$last &>/dev/null ; then
 # normal case: send incremental
 else
 	log "sending incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
-	ZFS "$srchost" send $send_opts -R -I "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
+	ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
 fi
 
 ###