diff --git a/devel/tinderbox/buildbot/master/master.cfg b/devel/tinderbox/buildbot/master/master.cfg
index 65b8ec446..8ed82836f 100644
--- a/devel/tinderbox/buildbot/master/master.cfg
+++ b/devel/tinderbox/buildbot/master/master.cfg
@@ -20,7 +20,7 @@ c['buildbotURL'] = "http://buildbot.aegisub.org/"
 
 # Used for accepting wchange notifications (svn-commit-hook) _and_ try attempts.
 from buildbot.changes.pb import PBChangeSource
-c['change_source'] = PBChangeSource()
+c['change_source'] = PBChangeSource(port="tcp:9900:interface=127.0.0.1")
 
 ####################################
 # Check if a file is worth a rebuild