diff --git a/mplexer/packer/packer.go b/mplexer/packer/packer.go
index b4c2ef2..f0ce543 100644
--- a/mplexer/packer/packer.go
+++ b/mplexer/packer/packer.go
@@ -4,12 +4,13 @@ import (
 	"fmt"
 )
 
-func Encode(src, dst Addr, domain string, payload []byte) ([]byte, []byte, error) {
+// Encode creates an MPLEXY V1 header for the given addresses and payload
+func Encode(id, tun Addr, domain string, payload []byte) ([]byte, []byte, error) {
 	n := len(payload)
 	header := []byte(fmt.Sprintf(
 		"%s,%s,%d,%d,%s,%d,%s,\n",
-		src.family, src.addr, src.port,
-		n, dst.scheme, dst.port, domain,
+		id.family, id.addr, id.port,
+		n, tun.scheme, tun.port, domain,
 	))
 	raw := []byte{255 - 1, byte(len(header))}
 	header = append(raw, header...)
diff --git a/mplexer/packer/packer_test.go b/mplexer/packer/packer_test.go
index 2c879d4..e59606c 100644
--- a/mplexer/packer/packer_test.go
+++ b/mplexer/packer/packer_test.go
@@ -6,13 +6,13 @@ import (
 )
 
 func TestEncodeDataMessage(t *testing.T) {
-	src := Addr{
+	id := Addr{
 		family: "IPv4",
 		addr:   "192.168.1.101",
 		port:   6743,
 	}
-	dst := Addr{
-		family: src.family,
+	tun := Addr{
+		family: id.family,
 		port:   80,
 		scheme: "http",
 	}
@@ -23,7 +23,7 @@ func TestEncodeDataMessage(t *testing.T) {
 	//header = append([]byte{V1, byte(len(header))}, header...)
 	header = append([]byte{254, byte(len(header))}, header...)
 
-	h, b, err := Encode(src, dst, domain, payload)
+	h, b, err := Encode(id, tun, domain, payload)
 	if nil != err {
 		t.Fatal(err)
 	}