diff --git a/Connect-to-OpenVPN-over-Shadowsocks.md b/Connect-to-OpenVPN-over-Shadowsocks.md
index 1ea3b00..8b61add 100644
--- a/Connect-to-OpenVPN-over-Shadowsocks.md
+++ b/Connect-to-OpenVPN-over-Shadowsocks.md
@@ -9,4 +9,8 @@ Add these lines to your .ovpn file:
     socks-proxy 127.0.0.1 1080
     route SHADOWSOCKS_SERVER_IP 255.255.255.255 net_gateway
 
+And make sure both server and client is configured to the TCP mode
+
+    proto tcp
+
 Then connect OpenVPN.
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