diff --git a/Piping.md b/Piping.md
index 2ab7604..13871e0 100644
--- a/Piping.md
+++ b/Piping.md
@@ -36,6 +36,8 @@ Offcourse the specific compressors need to be installed on both sides.
 
 If you want to limit the datarate, try using the `--rate` option. This is usefull to not saturate a slow uplink or do reduce IO load.
 
+This needs the mbuffer command on the sending side.
+
 ## Custom pipes
 
 It's also possible to add custom send or receive pipes with `--send-pipe` and `--recv-pipe`.