diff --git a/weed-fs/src/cmd/weedclient/weedclient.go b/weed-fs/src/cmd/weedclient/weedclient.go
index 266b9ef12..b6b93e41e 100644
--- a/weed-fs/src/cmd/weedclient/weedclient.go
+++ b/weed-fs/src/cmd/weedclient/weedclient.go
@@ -106,6 +106,8 @@ func submit(files []string)([]SubmitResult) {
 func main() {
 	flag.Parse()
 	if len(flag.Args()) == 0 {
+    fmt.Fprintln(os.Stderr, "Submit one file or multiple version of the same file.")
+    fmt.Fprintf(os.Stderr, "Usage: %s -server=<host>:<port> file1 [file2 file3 ...]\n", os.Args[0])
 		flag.Usage()
 		return
 	}