diff --git a/etc/object-server.conf-sample b/etc/object-server.conf-sample
index ee8e581042..99453ee4aa 100644
--- a/etc/object-server.conf-sample
+++ b/etc/object-server.conf-sample
@@ -269,7 +269,8 @@ use = egg:swift#recon
 # max duration of a partition rsync
 # rsync_timeout = 900
 #
-# bandwidth limit for rsync in kB/s. 0 means unlimited
+# bandwidth limit for rsync in kB/s. 0 means unlimited. rsync 3.2.2 and later
+# accept suffixed values like 10M or 1.5G; see the --bwlimit option for rsync(1)
 # rsync_bwlimit = 0
 #
 # passed to rsync for both io op timeout and connection timeout