--- a/mod_migrate/README.markdown	Fri Mar 30 13:40:06 2018 +0200
+++ b/mod_migrate/README.markdown	Fri Mar 30 13:40:50 2018 +0200
@@ -21,6 +21,10 @@
 `<target-driver>` is the storage driver to copy data to, sans the
 `mod_storage_` prefix.
 
+`mod_migrate` tries to request a list of users from `usermanager`, but
+this does not always work. If so, you can supply usernames as arguments
+after the target driver.
+
 The process is something like this:
 
 1.  Decide on the future configuration and add for example SQL