diff --git a/README.txt b/README.txt
index e69d4e7..8d099ce 100644
--- a/README.txt
+++ b/README.txt
@@ -37,6 +37,12 @@ attempting to use it on a live site. On the settings page you may choose
 node types to be omitted from the cloning mechanism - no users will be able
 to clone a node of an omitted type.
 
+If you are a developer and need to do some extra cleanup on a node that is
+being cloned, then you can declare the following function in your module:
+
+hook_clone_node_alter(&$node, $original_node, $method), where $method is either
+'prepopulate' or 'save-edit'.
+
 This module makes no attempt to respect field-level permissions set via
 CCK's Content Permissions module, or any other module that implements
 CCK field-level permissions hooks. You should test your configuration