diff --git a/README.rst b/README.rst
index 281b710..c682b23 100644
--- a/README.rst
+++ b/README.rst
@@ -991,6 +991,7 @@
         backend:
           engine: ovn
           ovsdb_connection: tcp:127.0.0.1:6640
+          mac_table_size: 16384
         metadata:
           enabled: true
           ovsdb_server_iface: ptcp:6640:127.0.0.1