diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index e84b9ef5b..3649406ef 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -421,7 +421,7 @@ def run(hs):
 
         daemon.start()
     else:
-        in_thread(hs.config)
+        in_thread()
 
 
 def main():