diff --git a/dialer/kcp/dialer.go b/dialer/kcp/dialer.go
index ebae3f1..20b993c 100644
--- a/dialer/kcp/dialer.go
+++ b/dialer/kcp/dialer.go
@@ -149,7 +149,9 @@ func (d *kcpDialer) initSession(ctx context.Context, addr net.Addr, conn net.Pac
 	smuxConfig.Version = config.SmuxVer
 	smuxConfig.MaxReceiveBuffer = config.SmuxBuf
 	smuxConfig.MaxStreamBuffer = config.StreamBuf
-	smuxConfig.KeepAliveInterval = time.Duration(config.KeepAlive) * time.Second
+	if config.KeepAlive > 0 {
+		smuxConfig.KeepAliveInterval = time.Duration(config.KeepAlive) * time.Second
+	}
 	var cc net.Conn = kcpconn
 	if !config.NoComp {
 		cc = kcp_util.CompStreamConn(kcpconn)
diff --git a/listener/kcp/listener.go b/listener/kcp/listener.go
index 2638548..abfdabd 100644
--- a/listener/kcp/listener.go
+++ b/listener/kcp/listener.go
@@ -160,7 +160,9 @@ func (l *kcpListener) mux(conn net.Conn) {
 	smuxConfig.Version = l.md.config.SmuxVer
 	smuxConfig.MaxReceiveBuffer = l.md.config.SmuxBuf
 	smuxConfig.MaxStreamBuffer = l.md.config.StreamBuf
-	smuxConfig.KeepAliveInterval = time.Duration(l.md.config.KeepAlive) * time.Second
+	if l.md.config.KeepAlive > 0 {
+		smuxConfig.KeepAliveInterval = time.Duration(l.md.config.KeepAlive) * time.Second
+	}
 
 	if !l.md.config.NoComp {
 		conn = kcp_util.CompStreamConn(conn)