diff --git a/docs/model-api.txt b/docs/model-api.txt
index 5524c7665414c..1aa8c811f4e27 100644
--- a/docs/model-api.txt
+++ b/docs/model-api.txt
@@ -188,7 +188,8 @@ JavaScript shortcuts.
 ~~~~~~~~~~~~~~
 
 A ``CharField`` that checks that the value is a valid e-mail address.
-This doesn't accept ``maxlength``.
+This doesn't accept ``maxlength``; its ``maxlength`` is automatically set to
+75.
 
 ``FileField``
 ~~~~~~~~~~~~~