diff --git a/synapse/crypto/keyclient.py b/synapse/crypto/keyclient.py
index 54b83da9d8..c2bd64d6c2 100644
--- a/synapse/crypto/keyclient.py
+++ b/synapse/crypto/keyclient.py
@@ -77,10 +77,12 @@ class SynapseKeyClientProtocol(HTTPClient):
     def __init__(self):
         self.remote_key = defer.Deferred()
         self.host = None
+        self._peer = None
 
     def connectionMade(self):
-        self.host = self.transport.getHost()
-        logger.debug("Connected to %s", self.host)
+        self._peer = self.transport.getPeer()
+        logger.debug("Connected to %s", self._peer)
+
         self.sendCommand(b"GET", self.path)
         if self.host:
             self.sendHeader(b"Host", self.host)
@@ -124,7 +126,10 @@ class SynapseKeyClientProtocol(HTTPClient):
         self.timer.cancel()
 
     def on_timeout(self):
-        logger.debug("Timeout waiting for response from %s", self.host)
+        logger.debug(
+            "Timeout waiting for response from %s: %s",
+            self.host, self._peer,
+        )
         self.errback(IOError("Timeout waiting for response"))
         self.transport.abortConnection()
 
@@ -133,4 +138,5 @@ class SynapseKeyClientFactory(Factory):
     def protocol(self):
         protocol = SynapseKeyClientProtocol()
         protocol.path = self.path
+        protocol.host = self.host
         return protocol