diff --git a/src/bin/local.rs b/src/bin/local.rs
index cad34e32..f03c3df4 100644
--- a/src/bin/local.rs
+++ b/src/bin/local.rs
@@ -132,18 +132,6 @@ fn main() {
             log_builder.filter(Some("sslocal"), LogLevelFilter::Trace)
                 .filter(Some("shadowsocks"), LogLevelFilter::Trace);
         }
-        4 => {
-            let mut log_builder = log_builder.format(|record: &LogRecord| {
-                format!("[{}][{}] [{}] {}",
-                        time::now().strftime("%Y-%m-%d][%H:%M:%S").unwrap(),
-                        record.level(),
-                        record.location().module_path(),
-                        record.args())
-            });
-            log_builder.filter(Some("sslocal"), LogLevelFilter::Trace)
-                .filter(Some("shadowsocks"), LogLevelFilter::Trace)
-                .filter(Some("coio"), LogLevelFilter::Trace);
-        }
         _ => {
             let mut log_builder = log_builder.format(|record: &LogRecord| {
                 format!("[{}][{}] [{}] {}",
diff --git a/src/bin/server.rs b/src/bin/server.rs
index c51b6aeb..ae10c3f5 100644
--- a/src/bin/server.rs
+++ b/src/bin/server.rs
@@ -144,18 +144,6 @@ fn main() {
                 .filter(Some("shadowsocks"), LogLevelFilter::Trace)
                 .filter(Some("coio"), LogLevelFilter::Trace);
         }
-        4 => {
-            let mut log_builder = log_builder.format(|record: &LogRecord| {
-                format!("[{}][{}] [{}] {}",
-                        time::now().strftime("%Y-%m-%d][%H:%M:%S").unwrap(),
-                        record.level(),
-                        record.location().module_path(),
-                        record.args())
-            });
-            log_builder.filter(Some("sslocal"), LogLevelFilter::Trace)
-                .filter(Some("shadowsocks"), LogLevelFilter::Trace)
-                .filter(Some("coio"), LogLevelFilter::Trace);
-        }
         _ => {
             let mut log_builder = log_builder.format(|record: &LogRecord| {
                 format!("[{}][{}] [{}] {}",