diff --git a/multiaddr_test.go b/multiaddr_test.go
index 261cba3..a0cf716 100644
--- a/multiaddr_test.go
+++ b/multiaddr_test.go
@@ -75,6 +75,7 @@ func TestConstructSucceeds(t *testing.T) {
 		"/onion/timaq4ygg2iegci7:1234",
 		"/onion/timaq4ygg2iegci7:80/http",
 		"/udp/0",
+		"/dtls",
 		"/tcp/0",
 		"/sctp/0",
 		"/udp/1234",
@@ -84,6 +85,7 @@ func TestConstructSucceeds(t *testing.T) {
 		"/tcp/65535",
 		"/ipfs/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC",
 		"/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC",
+		"/udp/1234/dtls",
 		"/udp/1234/sctp/1234",
 		"/udp/1234/udt",
 		"/udp/1234/utp",
@@ -93,6 +95,7 @@ func TestConstructSucceeds(t *testing.T) {
 		"/p2p/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC/tcp/1234",
 		"/ip4/127.0.0.1/udp/1234",
 		"/ip4/127.0.0.1/udp/0",
+		"/ip4/127.0.0.1/udp/1234/dtls",
 		"/ip4/127.0.0.1/tcp/1234",
 		"/ip4/127.0.0.1/tcp/1234/",
 		"/ip4/127.0.0.1/udp/1234/quic",
diff --git a/protocols.go b/protocols.go
index d466598..ba5428d 100644
--- a/protocols.go
+++ b/protocols.go
@@ -9,6 +9,7 @@ const (
 	P_IP4     = 0x0004
 	P_TCP     = 0x0006
 	P_UDP     = 0x0111
+	P_DTLS    = 0x0020
 	P_DCCP    = 0x0021
 	P_IP6     = 0x0029
 	P_IP6ZONE = 0x002A
@@ -49,6 +50,11 @@ var (
 		Path:       false,
 		Transcoder: TranscoderPort,
 	}
+	protoDTLS = Protocol{
+		Name:  "dtls",
+		Code:  P_DTLS,
+		VCode: CodeToVarint(P_DTLS),
+	}
 	protoDCCP = Protocol{
 		Name:       "dccp",
 		Code:       P_DCCP,
@@ -134,6 +140,7 @@ func init() {
 		protoIP4,
 		protoTCP,
 		protoUDP,
+		protoDTLS,
 		protoDCCP,
 		protoIP6,
 		protoIP6ZONE,