diff --git a/README.rst b/README.rst
index 108cd0b..64f768c 100644
--- a/README.rst
+++ b/README.rst
@@ -277,6 +277,11 @@ it's safe to use as your default manager for the model.
     ``InheritanceManager`` currently only supports a single level of model
     inheritance; it won't work for grandchild models.
 
+.. note::
+    The implementation of ``InheritanceManager`` uses ``select_related``
+    internally.  Due to `Django bug #16855`_, this currently means that it
+    will override any previous ``select_related`` calls on the ``QuerySet``.
+
 .. note::
     ``InheritanceManager`` requires Django 1.2 or later. Previous versions of
     django-model-utils included ``InheritanceCastModel``, an alternative (and
@@ -286,6 +291,7 @@ it's safe to use as your default manager for the model.
     its use in new code is discouraged.
 
 .. _contributed by Jeff Elmore: http://jeffelmore.org/2010/11/11/automatic-downcasting-of-inherited-models-in-django/
+.. _Django bug #16855: https://code.djangoproject.com/ticket/16855
 
 
 TimeStampedModel
@@ -373,3 +379,4 @@ directly on the manager::
    ``manager_from`` approach created dynamic ``QuerySet`` subclasses on the
    fly, which broke pickling of those querysets. For this reason,
    ``PassThroughManager`` is recommended instead.
+