diff --git a/doc/source/configuration/configuring.rst b/doc/source/configuration/configuring.rst
index 4ec900bbb..326c0bc42 100644
--- a/doc/source/configuration/configuring.rst
+++ b/doc/source/configuration/configuring.rst
@@ -239,10 +239,6 @@ so that the watcher service is configured for your needs.
 
     [DEFAULT]
 
-    # The messaging driver to use, defaults to rabbit. Other drivers
-    # include qpid and zmq. (string value)
-    #rpc_backend = rabbit
-
     # The default exchange under which topics are scoped. May be
     # overridden by an exchange name specified in the transport_url
     # option. (string value)
diff --git a/watcher/common/service.py b/watcher/common/service.py
index c184c8ec0..2e2254146 100644
--- a/watcher/common/service.py
+++ b/watcher/common/service.py
@@ -265,8 +265,7 @@ class Service(service.ServiceBase):
             allow_requeue=False, pool=CONF.host)
 
     def start(self):
-        LOG.debug("Connecting to '%s' (%s)",
-                  CONF.transport_url, CONF.rpc_backend)
+        LOG.debug("Connecting to '%s'", CONF.transport_url)
         if self.conductor_topic_handler:
             self.conductor_topic_handler.start()
         if self.notification_handler:
@@ -275,8 +274,7 @@ class Service(service.ServiceBase):
             self.heartbeat.start()
 
     def stop(self):
-        LOG.debug("Disconnecting from '%s' (%s)",
-                  CONF.transport_url, CONF.rpc_backend)
+        LOG.debug("Disconnecting from '%s'", CONF.transport_url)
         if self.conductor_topic_handler:
             self.conductor_topic_handler.stop()
         if self.notification_handler: