diff --git a/README.MD b/README.MD
index fb7afc4..0d96985 100644
--- a/README.MD
+++ b/README.MD
@@ -36,6 +36,8 @@ Usage of ./multissh:
         cmdfile path
   -cmds string
         cmds
+  -f string
+        write file locate
   -hostfile string
         hostfile path
   -hosts string