diff --git a/btrfs-decode-stream.py b/btrfs-decode-stream.py
index f9fcb786da2719a5965ed8608f7519120f85ba26..1f30f517256cd65fa24ecf6938777b2a4a8eb50a 100644
--- a/btrfs-decode-stream.py
+++ b/btrfs-decode-stream.py
@@ -2,9 +2,10 @@
 # -*- coding: utf-8 -*-
 #
 # Decode Btrfs send stream
+# btrfs send -p snap_old snap_cur --no-data -f /tmp/snaps-diff
 #
 # Author: Jean-Denis Girard <jd.girard@sysnux.pf>
-#
+
 
 from struct import unpack
 from sys import argv, exit, stdin, stderr