diff --git a/custom/README b/custom/README
index a7e8b517c48e46ea23c8d75909ebdb4d1e253d2c..68f0ce6cf7a3b82f08dff8eb8745ff95516d320e 100644
--- a/custom/README
+++ b/custom/README
@@ -2,8 +2,5 @@ This directory should hold configuration files for custom mininets.
 
 See custom_example.py, which loads the default minimal topology.  The advantage of defining a mininet in a separate file is that you then use the --custom option in mn to run the CLI or specific tests with it.
 
-Each custom file must define a Mininet object for an 'mn' variable.
-
-To start up a mininet with this custom topology, do:
-  sudo mn --custom custom_example.py
-
+To start up a mininet with the provided custom topology, do:
+  sudo mn --custom custom_example.py --topo mytopo