diff --git a/client/main.go b/client/main.go
index f6f06de..683e1eb 100644
--- a/client/main.go
+++ b/client/main.go
@@ -6,8 +6,6 @@ import (
 	"math/rand"
 	"net"
 	"os"
-	"os/signal"
-	"syscall"
 	"time"
 
 	"github.com/hashicorp/yamux"
@@ -52,7 +50,6 @@ func checkError(err error) {
 
 func main() {
 	rand.Seed(int64(time.Now().Nanosecond()))
-	go sig_handler()
 	myApp := cli.NewApp()
 	myApp.Name = "kcptun"
 	myApp.Usage = "kcptun client"
@@ -181,15 +178,3 @@ func main() {
 	}
 	myApp.Run(os.Args)
 }
-
-func sig_handler() {
-	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, syscall.SIGUSR1)
-
-	for {
-		switch <-ch {
-		case syscall.SIGUSR1:
-			log.Printf("KCP SNMP:%+v", kcp.DefaultSnmp.Copy())
-		}
-	}
-}
diff --git a/client/signal.go b/client/signal.go
new file mode 100644
index 0000000..8f3c74a
--- /dev/null
+++ b/client/signal.go
@@ -0,0 +1,28 @@
+// +build linux darwin freebsd
+
+package main
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/xtaci/kcp-go"
+)
+
+func init() {
+	go sig_handler()
+}
+
+func sig_handler() {
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, syscall.SIGUSR1)
+
+	for {
+		switch <-ch {
+		case syscall.SIGUSR1:
+			log.Printf("KCP SNMP:%+v", kcp.DefaultSnmp.Copy())
+		}
+	}
+}
diff --git a/server/main.go b/server/main.go
index 235c55b..0c8afdb 100644
--- a/server/main.go
+++ b/server/main.go
@@ -6,8 +6,6 @@ import (
 	"math/rand"
 	"net"
 	"os"
-	"os/signal"
-	"syscall"
 	"time"
 
 	"github.com/hashicorp/yamux"
@@ -80,7 +78,6 @@ func handleClient(p1, p2 net.Conn) {
 
 func main() {
 	rand.Seed(int64(time.Now().Nanosecond()))
-	go sig_handler()
 	myApp := cli.NewApp()
 	myApp.Name = "kcptun"
 	myApp.Usage = "kcptun server"
@@ -178,14 +175,3 @@ func main() {
 	}
 	myApp.Run(os.Args)
 }
-func sig_handler() {
-	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, syscall.SIGUSR1)
-
-	for {
-		switch <-ch {
-		case syscall.SIGUSR1:
-			log.Printf("KCP SNMP:%+v", kcp.DefaultSnmp.Copy())
-		}
-	}
-}
diff --git a/server/signal.go b/server/signal.go
new file mode 100644
index 0000000..8f3c74a
--- /dev/null
+++ b/server/signal.go
@@ -0,0 +1,28 @@
+// +build linux darwin freebsd
+
+package main
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/xtaci/kcp-go"
+)
+
+func init() {
+	go sig_handler()
+}
+
+func sig_handler() {
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, syscall.SIGUSR1)
+
+	for {
+		switch <-ch {
+		case syscall.SIGUSR1:
+			log.Printf("KCP SNMP:%+v", kcp.DefaultSnmp.Copy())
+		}
+	}
+}