diff --git a/README.md b/README.md
index ae1a6bc..e3d2a9d 100644
--- a/README.md
+++ b/README.md
@@ -143,7 +143,7 @@ cargo run -p lanparty-gateway -- \
   --server-name lanparty-relay.local \
   --relay-ca-cert relay-cert.der \
   --room ROOM1 \
-  --interface eth0
+  --iface eth0
 ```
 
 The gateway connects to the relay as `role = gateway`, completes the
diff --git a/crates/lanparty-gateway/src/lib.rs b/crates/lanparty-gateway/src/lib.rs
index d074c81..68ed13f 100644
--- a/crates/lanparty-gateway/src/lib.rs
+++ b/crates/lanparty-gateway/src/lib.rs
@@ -79,7 +79,7 @@ pub struct GatewayArgs {
     room: RoomCode,
 
     /// Wired LAN interface that will later be opened with AF_PACKET.
-    #[arg(long)]
+    #[arg(long, alias = "iface")]
     interface: String,
 
     /// Gateway's advertised QUIC datagram budget before relay clamping.
@@ -832,6 +832,23 @@ mod tests {
         );
     }
 
+    #[test]
+    fn accepts_iface_alias_for_gateway_interface() {
+        let args = GatewayArgs::parse_from([
+            "lanparty-gateway",
+            "--relay",
+            "127.0.0.1:443",
+            "--relay-ca-cert",
+            "relay-cert.der",
+            "--room",
+            "ROOM1",
+            "--iface",
+            "eth0",
+        ]);
+
+        assert_eq!(args.interface, "eth0");
+    }
+
     #[tokio::test]
     async fn connects_to_relay_control_stream_as_gateway() {
         let (server_config, certificate) = test_server_config();