diff --git a/README.md b/README.md
index c41250c..33277c6 100644
--- a/README.md
+++ b/README.md
@@ -229,6 +229,8 @@ If you need to add node labels before and after the reboot process, you can use
       --after-reboot-node-labels=zalando=ready
 ```
 
+Labels can be comma-delimited (e.g. `--pre-reboot-node-labels=zalando=notready,thisnode=disabled`) or you can supply the flags multiple times.
+
 Note that label keys specified by these two flags should match. If they do not match, a warning will be generated.
 
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