diff --git a/docs/databases.txt b/docs/databases.txt
index 213c2d666c..4530a1b896 100644
--- a/docs/databases.txt
+++ b/docs/databases.txt
@@ -76,6 +76,14 @@ the ``mysql`` backend.
 If you are trying to use an older version of MySQL and the ``mysql_old``
 backend, then 1.2.0 *might* work for you.
 
+.. note::
+    If you see ``ImportError: cannot import name ImmutableSet`` when trying to
+    use Django, your MySQLdb installation may contain an outdated ``sets.py``
+    file that conflicts with the built-in module of the same name from Python
+    2.4 and later. To fix this, verify that you have installed MySQLdb version
+    1.2.1p2 or newer, then delete the ``sets.py`` file in the MySQLdb
+    directory that was left by an earlier version.
+
 .. _MySQLdb: http://sourceforge.net/projects/mysql-python
 
 Creating your database