diff --git a/crates/shadowsocks-service/src/local/online_config/mod.rs b/crates/shadowsocks-service/src/local/online_config/mod.rs
index 871c2ff4..760acc83 100644
--- a/crates/shadowsocks-service/src/local/online_config/mod.rs
+++ b/crates/shadowsocks-service/src/local/online_config/mod.rs
@@ -217,7 +217,7 @@ impl OnlineConfigService {
         // Check plugin whitelist
         if let Some(ref allowed_plugins) = self.allowed_plugins {
             for server in &online_config.server {
-                if let Some(ref plugin) = server.config.plugin() {
+                if let Some(plugin) = server.config.plugin() {
                     if !allowed_plugins.contains(&plugin.plugin) {
                         error!(
                             "server-loader task found not allowed plugin: {}, url: {}",