diff --git a/configs/vzdump.conf b/configs/vzdump.conf
index d14942dd..a0075cfa 100644
--- a/configs/vzdump.conf
+++ b/configs/vzdump.conf
@@ -10,7 +10,7 @@
 #stopwait: MINUTES
 #stdexcludes: BOOLEAN
 #mailto: ADDRESSLIST
-#maxfiles: N
+#prune-backups: keep-INTERVAL=N[,...]
 #script: FILENAME
 #exclude-path: PATHLIST
 #pigz: N