diff --git a/specs/waku/waku-v2.md b/specs/waku/waku-v2.md
index 483c0295..f5e5f225 100644
--- a/specs/waku/waku-v2.md
+++ b/specs/waku/waku-v2.md
@@ -85,10 +85,16 @@ TODO
 
 *NOTE: Should highlight use of libp2p, PubSub (with WakuSub<FloodSub initiailly), and optionally bridging with Waku v1.*
 
-Waku v2 is using PubSub in Libp2p. See [PubSub interface for libp2p (r2, 2019-02-01, 958beeed6a90a3cf39db2bb089724d0d44d32296)](https://github.com/libp2p/specs/blob/master/pubsub/README.md) for more details on that.
+Waku v2 is using PubSub in Libp2p. See [PubSub interface for libp2p (r2, 2019-02-01, 958beeed6a90a3cf39db2bb089724d0d44d32296)](https://github.com/libp2p/specs/blob/master/pubsub/README.md** for more details on that.
 
 We are using protobuf RPC messages between peers.
 
+### Protocol Identifier
+
+The current protocol identifier is: `/wakusub/0.0.1` [xx1].
+
+**TODO Update to 2.0.0-alpha0**
+
 ## Wire Specification
 
 TODO
@@ -106,3 +112,5 @@ Copyright and related rights waived via [CC0](https://creativecommons.org/public
 ## Footnotes
 
 TODO
+
+xx1: https://docs.libp2p.io/concepts/protocols/