diff --git a/src/wormhole/const.py b/src/wormhole/const.py
index 85ae953..5e6b99f 100644
--- a/src/wormhole/const.py
+++ b/src/wormhole/const.py
@@ -2,4 +2,4 @@
 # This is a relay I run on a personal server. If it gets too expensive to
 # run, I'll shut it down.
 RENDEZVOUS_RELAY = "http://relay.petmail.org:8009/relay/"
-TRANSIT_RELAY = "relay.petmail.org,8010"
+TRANSIT_RELAY = "tcp:relay.petmail.org:8010"