diff --git a/backup.sh b/backup.sh
index c72e940..de9834d 100755
--- a/backup.sh
+++ b/backup.sh
@@ -13,6 +13,7 @@ datasets_file="datasets.txt"
 # <dataset 2> [remote dataset]
 # <dataset 3> [remote dataset]
 # ...
+# recognized options: nosend nosnap(shot) remotezfs=<remote dataset name>
 
 if [ ! -f $nodes_file ]; then echo "No nodes specified."; exit 2; fi
 if [ ! -f $datasets_file ]; then echo "No datasets specified."; exit 3; fi