diff --git a/auth_user_case_insensitive/README.rst b/auth_user_case_insensitive/README.rst
index 2e3d450add5..87e17ec3989 100644
--- a/auth_user_case_insensitive/README.rst
+++ b/auth_user_case_insensitive/README.rst
@@ -16,6 +16,9 @@ Installation
 Install this module as you would any other. No further configuration is
 required.
 
+Note that upon installation the existing logins will all be converted to lowercase.
+
+
 Bug Tracker
 ===========