diff --git a/backup.sh b/backup.sh
index f4ad6c8..aedbceb 100755
--- a/backup.sh
+++ b/backup.sh
@@ -3,8 +3,8 @@
 nodes_file="nodes.txt"
 ### nodes.txt
 # <origin host>   <user> <ssh port> <timezone> <compressed flag>
-# <mirror 1 host> <user> <ssh port> <zfs root>
-# <mirror 2 host> <user> <ssh port> <zfs root>
+# <mirror 1 host> <user> <ssh port> <zfs root> <send speed>
+# <mirror 2 host> <user> <ssh port> <zfs root> <send speed>
 # ...
 
 datasets_file="datasets.txt"
@@ -104,7 +104,7 @@ get_latest_remote_snapshot()
         esac
     fi
     ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
-        "zfs list -t snapshot $zroot\$dataset    |
+        "zfs list -t snapshot $zroot$dataset    |
             tail -n1|cut -d'@' -f2|cut -d' ' -f 1"
 }