diff --git a/README.rst b/README.rst
index 11d048be..43a7cc40 100644
--- a/README.rst
+++ b/README.rst
@@ -174,7 +174,7 @@ Data Tree
    ...             {'name': 'lo', 'address': '127.0.0.1'},
    ...         ],
    ...     },
-   ... })
+   ... }, config=True)
    >>> print(node.print_mem('xml', pretty=True))
    <data xmlns="urn:example">
      <interface>