diff --git a/crates/shadowsocks-service/src/local/redir/sys/mod.rs b/crates/shadowsocks-service/src/local/redir/sys/mod.rs
index 5438fd2b339f..64a290d1b8bd 100644
--- a/crates/shadowsocks-service/src/local/redir/sys/mod.rs
+++ b/crates/shadowsocks-service/src/local/redir/sys/mod.rs
@@ -36,6 +36,6 @@ where
     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();
+    let _ = sock.into_raw_socket();
     result
 }
diff --git a/crates/shadowsocks-service/src/server/udprelay.rs b/crates/shadowsocks-service/src/server/udprelay.rs
index 5d64343b3f70..e6835454bd2d 100644
--- a/crates/shadowsocks-service/src/server/udprelay.rs
+++ b/crates/shadowsocks-service/src/server/udprelay.rs
@@ -28,8 +28,6 @@ use shadowsocks::{
     ServerConfig,
 };
 use tokio::{runtime::Handle, sync::mpsc, task::JoinHandle, time};
-#[cfg(windows)]
-use windows_sys::Win32::Networking::WinSock::WSAEAFNOSUPPORT;
 
 use crate::net::{
     packet_window::PacketWindowFilter, utils::to_ipv4_mapped, MonProxySocket, UDP_ASSOCIATION_KEEP_ALIVE_CHANNEL_SIZE,
diff --git a/crates/shadowsocks/src/net/sys/mod.rs b/crates/shadowsocks/src/net/sys/mod.rs
index b36033a79781..6540508e951c 100644
--- a/crates/shadowsocks/src/net/sys/mod.rs
+++ b/crates/shadowsocks/src/net/sys/mod.rs
@@ -87,7 +87,7 @@ where
 
     let sock = unsafe { Socket::from_raw_socket(handle) };
     let result = socket_bind_dual_stack_inner(&sock, addr, ipv6_only);
-    sock.into_raw_socket();
+    let _ = sock.into_raw_socket();
 
     result
 }
diff --git a/src/service/local.rs b/src/service/local.rs
index 50e977d51fca..8e108e70ead9 100644
--- a/src/service/local.rs
+++ b/src/service/local.rs
@@ -1,11 +1,12 @@
 //! Local server launchers
 
+#[cfg(unix)]
+use std::sync::Arc;
 use std::{
     future::Future,
     net::IpAddr,
     path::PathBuf,
     process::ExitCode,
-    sync::Arc,
     time::{Duration, Instant},
 };
 
@@ -1065,7 +1066,7 @@ struct ServerReloader {
 }
 
 impl ServerReloader {
-    #[cfg_attr(not(any(unix, feature = "local-online-config")), allow(dead_code))]
+    #[cfg_attr(not(unix), allow(dead_code))]
     async fn run_once(&self) -> Result<(), Box<dyn std::error::Error>> {
         let start_time = Instant::now();