diff --git a/libp2p/host/ping.py b/libp2p/host/ping.py
index 46a28e06..9075f0bb 100644
--- a/libp2p/host/ping.py
+++ b/libp2p/host/ping.py
@@ -4,8 +4,9 @@ import logging
 from libp2p.network.stream.exceptions import StreamEOF, StreamReset
 from libp2p.network.stream.net_stream_interface import INetStream
 from libp2p.peer.id import ID as PeerID
+from libp2p.typing import TProtocol
 
-ID = "/ipfs/ping/1.0.0"
+ID = TProtocol("/ipfs/ping/1.0.0")
 PING_LENGTH = 32
 RESP_TIMEOUT = 60
 
diff --git a/libp2p/identity/identify/protocol.py b/libp2p/identity/identify/protocol.py
index b42e51a9..390c0de2 100644
--- a/libp2p/identity/identify/protocol.py
+++ b/libp2p/identity/identify/protocol.py
@@ -4,11 +4,11 @@ from multiaddr import Multiaddr
 
 from libp2p.host.host_interface import IHost
 from libp2p.network.stream.net_stream_interface import INetStream
-from libp2p.typing import StreamHandlerFn
+from libp2p.typing import StreamHandlerFn, TProtocol
 
 from .pb.identify_pb2 import Identify
 
-ID = "/ipfs/id/1.0.0"
+ID = TProtocol("/ipfs/id/1.0.0")
 PROTOCOL_VERSION = "ipfs/0.1.0"
 # TODO dynamically generate the agent version
 AGENT_VERSION = "py-libp2p/alpha"