diff --git a/devstack/lib/watcher b/devstack/lib/watcher
index 69cbb9785..d247f5ca6 100644
--- a/devstack/lib/watcher
+++ b/devstack/lib/watcher
@@ -177,6 +177,8 @@ function create_watcher_conf {
     iniset $WATCHER_CONF DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"
     iniset $WATCHER_CONF DEFAULT control_exchange watcher
 
+    iniset_rpc_backend watcher $WATCHER_CONF
+
     iniset $WATCHER_CONF database connection $(database_connection_url watcher)
     iniset $WATCHER_CONF api host "$WATCHER_SERVICE_HOST"
 
@@ -189,10 +191,6 @@ function create_watcher_conf {
 
     iniset $WATCHER_CONF oslo_policy policy_file $WATCHER_POLICY_YAML
 
-    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_userid $RABBIT_USERID
-    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_password $RABBIT_PASSWORD
-    iniset $WATCHER_CONF oslo_messaging_rabbit rabbit_host $RABBIT_HOST
-
     iniset $WATCHER_CONF oslo_messaging_notifications driver "messagingv2"
 
     iniset $NOVA_CONF oslo_messaging_notifications topics "notifications,watcher_notifications"
diff --git a/doc/source/configuration/configuring.rst b/doc/source/configuration/configuring.rst
index 983874a7e..15d74fbef 100644
--- a/doc/source/configuration/configuring.rst
+++ b/doc/source/configuration/configuring.rst
@@ -235,21 +235,8 @@ so that the watcher service is configured for your needs.
     # option. (string value)
     control_exchange = watcher
 
-    ...
-
-    [oslo_messaging_rabbit]
-
-    # The username used by the message broker (string value)
-    rabbit_userid = RABBITMQ_USER
-
-    # The password of user used by the message broker (string value)
-    rabbit_password = RABBITMQ_PASSWORD
-
-    # The host where the message brokeris installed (string value)
-    rabbit_host = RABBIT_HOST
-
-    # The port used bythe message broker (string value)
-    #rabbit_port = 5672
+    # ...
+    transport_url = rabbit://RABBITMQ_USER:RABBITMQ_PASSWORD@RABBIT_HOST
 
 
 #. Watcher API shall validate the token provided by every incoming request,