diff --git a/src/bin/tunnel.rs b/src/bin/tunnel.rs
index d5bb342b..817cf7bd 100644
--- a/src/bin/tunnel.rs
+++ b/src/bin/tunnel.rs
@@ -65,6 +65,7 @@ fn main() {
                 .short("f")
                 .long("foward-addr")
                 .takes_value(true)
+                .required(true)
                 .help("Forward address, forward to this address"),
         )
         .arg(