diff --git a/doc/source/zuul.rst b/doc/source/zuul.rst
index 884e25f..b767210 100644
--- a/doc/source/zuul.rst
+++ b/doc/source/zuul.rst
@@ -56,6 +56,10 @@
   Whether to start the internal Gearman server (default: False).
   ``start=true``
 
+**listen_address**
+  IP address or domain name on which to listen (default: all addresses).
+  ``listen_address=127.0.0.1``
+
 **log_config**
   Path to log config file for internal Gearman server.
   ``log_config=/etc/zuul/gearman-logging.yaml``