diff --git a/backup.sh b/backup.sh
index 6b4cc60..a5f0d7e 100755
--- a/backup.sh
+++ b/backup.sh
@@ -162,7 +162,7 @@ get_latest_remote_snapshot()
             *) zroot="$zroot/" ;;
         esac
     fi
-    list_cmd="zfs list -t snapshot $rset"
+    list_cmd="zfs list -t snapshot $zroot$rset"
     remote_cmd="$list_cmd|tail -n1|cut -d'@' -f2|cut -d' ' -f 1"
     run_remote
 }