diff --git a/message/body_decoder.go b/message/body_decoder.go
index d9c0ceb..9509eda 100644
--- a/message/body_decoder.go
+++ b/message/body_decoder.go
@@ -200,7 +200,12 @@ func DecodeBodyPublish(_ io.Reader, d AMFDecoder, v *AMFConvertible) error {
 	}
 	var publishingType string
 	if err := d.Decode(&publishingType); err != nil {
-		return errors.Wrap(err, "Failed to decode 'publish' args[2]")
+		// value is optional
+		if errors.Is(err, io.EOF) {
+			publishingType = "live"
+		} else {
+			return errors.Wrap(err, "Failed to decode 'publish' args[2]")
+		}
 	}
 
 	var cmd NetStreamPublish
diff --git a/message/body_decoder_test.go b/message/body_decoder_test.go
index 2d966a4..2088a3c 100644
--- a/message/body_decoder_test.go
+++ b/message/body_decoder_test.go
@@ -112,6 +112,25 @@ func TestDecodeCmdMessagePublish(t *testing.T) {
 	}, v)
 }
 
+func TestDecodeCmdMessagePublishWithoutPublishingType(t *testing.T) {
+	bin := []byte{
+		// nil
+		0x05,
+		// string: abc
+		0x02, 0x00, 0x03, 0x61, 0x62, 0x63,
+	}
+	r := bytes.NewReader(bin)
+	d := amf0.NewDecoder(r)
+
+	var v AMFConvertible
+	err := CmdBodyDecoderFor("publish", 42)(r, d, &v)
+	require.Nil(t, err)
+	require.Equal(t, &NetStreamPublish{
+		PublishingName: "abc",
+		PublishingType: "live",
+	}, v)
+}
+
 func TestDecodeCmdMessagePlay(t *testing.T) {
 	bin := []byte{
 		// nil