diff --git a/man/ss-server.1 b/man/ss-server.1
index b49ec1de..e0983ce2 100644
--- a/man/ss-server.1
+++ b/man/ss-server.1
@@ -96,6 +96,9 @@ listen on 0.0.0.0:8388 and bind to eth1. That results the traffic go out through
 eth1, but not lo nor eth0. This option is useful to control traffic in
 multi-interface environment.
 .TP
+.B \-b \fIlocal_address\fP
+Specify local address to bind.
+.TP
 .B \-u
 Enable UDP relay.
 .TP