diff --git a/infra/conf/transport_internet.go b/infra/conf/transport_internet.go
index 5a8d4f895..a6052ff9f 100644
--- a/infra/conf/transport_internet.go
+++ b/infra/conf/transport_internet.go
@@ -404,8 +404,8 @@ func (c *SplitHTTPConfig) Build() (proto.Message, error) {
 		return nil, errors.New("maxConnections cannot be specified together with maxConcurrency")
 	}
 	if c.Xmux == (XmuxConfig{}) {
-		c.Xmux.MaxConcurrency.From = 1
-		c.Xmux.MaxConcurrency.To = 1
+		c.Xmux.MaxConnections.From = 6
+		c.Xmux.MaxConnections.To = 6
 		c.Xmux.HMaxRequestTimes.From = 600
 		c.Xmux.HMaxRequestTimes.To = 900
 		c.Xmux.HMaxReusableSecs.From = 1800