diff --git a/tlv.go b/tlv.go
index 899a220..7cc2fb3 100644
--- a/tlv.go
+++ b/tlv.go
@@ -16,6 +16,7 @@ const (
 	PP2_TYPE_AUTHORITY      PP2Type = 0x02
 	PP2_TYPE_CRC32C         PP2Type = 0x03
 	PP2_TYPE_NOOP           PP2Type = 0x04
+	PP2_TYPE_UNIQUE_ID      PP2Type = 0x05
 	PP2_TYPE_SSL            PP2Type = 0x20
 	PP2_SUBTYPE_SSL_VERSION PP2Type = 0x21
 	PP2_SUBTYPE_SSL_CN      PP2Type = 0x22
@@ -97,6 +98,7 @@ func (p PP2Type) Registered() bool {
 		PP2_TYPE_AUTHORITY,
 		PP2_TYPE_CRC32C,
 		PP2_TYPE_NOOP,
+		PP2_TYPE_UNIQUE_ID,
 		PP2_TYPE_SSL,
 		PP2_SUBTYPE_SSL_VERSION,
 		PP2_SUBTYPE_SSL_CN,
diff --git a/tlv_test.go b/tlv_test.go
index 1fad0d9..1f7285c 100644
--- a/tlv_test.go
+++ b/tlv_test.go
@@ -100,7 +100,7 @@ func TestInvalidV2TLV(t *testing.T) {
 
 func TestV2TLVPP2Registered(t *testing.T) {
 	pp2RegTypes := []PP2Type{
-		PP2_TYPE_ALPN, PP2_TYPE_AUTHORITY, PP2_TYPE_CRC32C, PP2_TYPE_NOOP,
+		PP2_TYPE_ALPN, PP2_TYPE_AUTHORITY, PP2_TYPE_CRC32C, PP2_TYPE_NOOP, PP2_TYPE_UNIQUE_ID,
 		PP2_TYPE_SSL, PP2_SUBTYPE_SSL_VERSION, PP2_SUBTYPE_SSL_CN,
 		PP2_SUBTYPE_SSL_CIPHER, PP2_SUBTYPE_SSL_SIG_ALG, PP2_SUBTYPE_SSL_KEY_ALG,
 		PP2_TYPE_NETNS,