From f6dba6da1ffbdc699efe98685c5c0dfc32d4b2c5 Mon Sep 17 00:00:00 2001
From: wangyu- <wangyucn@gmail.com>
Date: Sat, 28 Oct 2017 07:44:25 -0500
Subject: [PATCH] trival

---
 misc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc.cpp b/misc.cpp
index 5dee0ea..ed5162c 100644
--- a/misc.cpp
+++ b/misc.cpp
@@ -566,7 +566,7 @@ void process_arg(int argc, char *argv[])
 		{"jitter", required_argument,   0,'j'},
 		{"fifo", required_argument,    0, 1},
 		{"sub-net", required_argument,    0, 1},
-		{"tun-dev", optional_argument,    0, 1},
+		{"tun-dev", required_argument,    0, 1},
 		{NULL, 0, 0, 0}
       };
     int option_index = 0;