diff --git a/keepalive/keepalive.go b/keepalive/keepalive.go
index 4a18d52c..aeca2a6b 100644
--- a/keepalive/keepalive.go
+++ b/keepalive/keepalive.go
@@ -22,13 +22,13 @@ func (p *Params) Validate() {
 		p.Time = Infinity
 	}
 	if p.Timeout == 0 {
-		p.Time = TwentySec
+		p.Time = TwentyScnd
 	}
 }
 
 const (
 	// Infinity is the default value of keepalive time.
 	Infinity = time.Duration(math.MaxInt64)
-	// TwentySec is the default value of timeout.
-	TwentySec = time.Duration(20 * time.Second)
+	// TwentyScnd is the default value of timeout.
+	TwentyScnd = time.Duration(20 * time.Second)
 )
diff --git a/transport/transport.go b/transport/transport.go
index f6b1754b..7b34e99f 100644
--- a/transport/transport.go
+++ b/transport/transport.go
@@ -392,7 +392,7 @@ type ConnectOptions struct {
 // default values for keepalive parameters.
 var defaultKeepaliveParams = &keepalive.Params{
 	Time:    keepalive.Infinity, // default to infinite.
-	Timeout: keepalive.TwentySec,
+	Timeout: keepalive.TwentyScnd,
 }
 
 // TargetInfo contains the information of the target such as network address and metadata.