diff --git a/defaults/main.yml b/defaults/main.yml
index 1ab03f0b..7bb18ab0 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -47,7 +47,6 @@ octavia_db_pool_timeout: 30
 ## RabbitMQ info
 
 ## Configuration for RPC communications
-octavia_rpc_backend: octavia.openstack.common.rpc.impl_kombu
 octavia_rabbitmq_userid: octavia
 octavia_rabbitmq_vhost: /octavia
 octavia_rabbitmq_servers: 127.0.0.1
@@ -127,7 +126,6 @@ octavia_service_internalurl: "{{ octavia_service_internaluri }}/v1/%(tenant_id)s
 octavia_service_in_ldap: false
 
 ## RPC
-octavia_rpc_backend: rabbit
 octavia_rpc_thread_pool_size: 64
 octavia_rpc_conn_pool_size: 30
 octavia_rpc_response_timeout: 60
diff --git a/releasenotes/notes/remove_rpc_backend-1729234e23895f18.yaml b/releasenotes/notes/remove_rpc_backend-1729234e23895f18.yaml
new file mode 100644
index 00000000..d5a89241
--- /dev/null
+++ b/releasenotes/notes/remove_rpc_backend-1729234e23895f18.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Remove ``octavia_rpc_backend`` option due to deprecation of
+    rpc_backend option in oslo.messaging.