diff --git a/crates/shadowsocks-service/src/local/redir/sys/mod.rs b/crates/shadowsocks-service/src/local/redir/sys/mod.rs
index 7cb39d74af3b..15c6c7efe4c6 100644
--- a/crates/shadowsocks-service/src/local/redir/sys/mod.rs
+++ b/crates/shadowsocks-service/src/local/redir/sys/mod.rs
@@ -24,16 +24,16 @@ where
     result
 }
 
-#[cfg(windows)]
-pub fn set_ipv6_only<S>(socket: &S, ipv6_only: bool) -> io::Result<()>
-where
-    S: std::os::windows::io::AsRawSocket,
-{
-    use std::os::windows::io::{FromRawSocket, IntoRawSocket};
-
-    let handle = socket.as_raw_socket();
-    let sock = unsafe { Socket::from_raw_socket(handle) };
-    let result = sock.set_only_v6(ipv6_only);
-    sock.into_raw_socket();
-    result
-}
+// #[cfg(windows)]
+// pub fn set_ipv6_only<S>(socket: &S, ipv6_only: bool) -> io::Result<()>
+// where
+//     S: std::os::windows::io::AsRawSocket,
+// {
+//     use std::os::windows::io::{FromRawSocket, IntoRawSocket};
+//
+//     let handle = socket.as_raw_socket();
+//     let sock = unsafe { Socket::from_raw_socket(handle) };
+//     let result = sock.set_only_v6(ipv6_only);
+//     sock.into_raw_socket();
+//     result
+// }
diff --git a/crates/shadowsocks-service/src/local/redir/udprelay/mod.rs b/crates/shadowsocks-service/src/local/redir/udprelay/mod.rs
index 721315b290a8..0cb931920684 100644
--- a/crates/shadowsocks-service/src/local/redir/udprelay/mod.rs
+++ b/crates/shadowsocks-service/src/local/redir/udprelay/mod.rs
@@ -101,6 +101,7 @@ impl UdpInboundWrite for UdpRedirInboundWriter {
         // then we should always use IPv6 sockets for sending IPv4 packets.
         static SUPPORT_IPV6_TRANSPARENT: AtomicBool = AtomicBool::new(true);
 
+        #[allow(unused_mut)]
         let mut addr = match *remote_addr {
             Address::SocketAddress(sa) => {
                 if SUPPORT_IPV6_TRANSPARENT.load(Ordering::Relaxed) {