diff --git a/weed/command/server.go b/weed/command/server.go
index a4050aa51..f6c033c64 100644
--- a/weed/command/server.go
+++ b/weed/command/server.go
@@ -107,7 +107,7 @@ func init() {
 	serverOptions.v.indexType = cmdServer.Flag.String("volume.index", "memory", "Choose [memory|leveldb|leveldbMedium|leveldbLarge] mode for memory~performance balance.")
 	serverOptions.v.diskType = cmdServer.Flag.String("volume.disk", "", "[hdd|ssd|<tag>] hard drive or solid state drive or any tag")
 	serverOptions.v.fixJpgOrientation = cmdServer.Flag.Bool("volume.images.fix.orientation", false, "Adjust jpg orientation when uploading.")
-	serverOptions.v.readMode = cmdServer.Flag.String("volume.readMode", "redirect", "[local|remote|redirect] how to deal with non-local volume: 'not found|read in remote node|redirect volume location'.")
+	serverOptions.v.readMode = cmdServer.Flag.String("volume.readMode", "redirect", "[local|proxy|redirect] how to deal with non-local volume: 'not found|read in remote node|redirect volume location'.")
 	serverOptions.v.compactionMBPerSecond = cmdServer.Flag.Int("volume.compactionMBps", 0, "limit compaction speed in mega bytes per second")
 	serverOptions.v.fileSizeLimitMB = cmdServer.Flag.Int("volume.fileSizeLimitMB", 256, "limit file size to avoid out of memory")
 	serverOptions.v.concurrentUploadLimitMB = cmdServer.Flag.Int("volume.concurrentUploadLimitMB", 64, "limit total concurrent upload size")