diff --git a/defaults/main.yml b/defaults/main.yml
index be6e5484..c071a7a8 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -174,7 +174,6 @@ neutron_db_pool_timeout: 30
 ### RPC (RabbitMQ) integration
 ###
 
-neutron_rpc_backend: rabbit
 neutron_rabbitmq_userid: neutron
 neutron_rabbitmq_vhost: /neutron
 neutron_rabbitmq_port: 5672
diff --git a/releasenotes/notes/remove_rpc_backend-8134a355d9864e12.yaml b/releasenotes/notes/remove_rpc_backend-8134a355d9864e12.yaml
new file mode 100644
index 00000000..36213462
--- /dev/null
+++ b/releasenotes/notes/remove_rpc_backend-8134a355d9864e12.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Remove ``neutron_rpc_backend`` option due to deprecation of
+    rpc_backend option in oslo.messaging.