diff --git a/kcp-go/kcp.go b/kcp-go/kcp.go
index 0f5aeff..29d0d72 100755
--- a/kcp-go/kcp.go
+++ b/kcp-go/kcp.go
@@ -798,7 +798,7 @@ func (kcp *KCP) flush(ackOnly bool) uint32 {
 		}
 
 		// get the nearest rto
-		if rto := _itimediff(segment.rto, current); rto > 0 && rto < minrto {
+		if rto := _itimediff(segment.resendts, current); rto > 0 && rto < minrto {
 			minrto = rto
 		}
 	}
diff --git a/p2pclient/main.go b/p2pclient/main.go
index 8c64f42..0e91b76 100755
--- a/p2pclient/main.go
+++ b/p2pclient/main.go
@@ -116,7 +116,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:  "mode",
-			Value: "fast2",
+			Value: "fast1",
 			Usage: "profiles: fast3, fast2, fast, normal, manual",
 		},
 		cli.IntFlag{
diff --git a/p2pserver/main.go b/p2pserver/main.go
index c928937..6c53b18 100755
--- a/p2pserver/main.go
+++ b/p2pserver/main.go
@@ -66,7 +66,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:  "mode",
-			Value: "fast2",
+			Value: "fast1",
 			Usage: "profiles: fast3, fast2, fast, normal, manual",
 		},
 		cli.IntFlag{