diff --git a/local_settings.py.example b/local_settings.py.example
index 00aac3291e19f861fafff4a1c3fd2f5839917b70..db1a7d79232e73d062d2690bff1c3e3bafaf0b40 100644
--- a/local_settings.py.example
+++ b/local_settings.py.example
@@ -31,9 +31,15 @@ RELATE_BASE_URL = "http://YOUR/RELATE/SITE/DOMAIN"
 # properly if you enable this. (or a similar out-of-process cache
 # backend)
 #
+# You must 'pip install pylibmc' to use this (which in turn may require
+# installing 'libmemcached-dev').
+#
+# Btw, do not be tempted to use 'MemcachedCache'--it's unmaintained and
+# broken in Python 33, as of 2016-08-01.
+#
 # CACHES = {
 #     'default': {
-#         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
+#         'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache',
 #         'LOCATION': '127.0.0.1:11211',
 #     }
 # }
diff --git a/requirements.txt b/requirements.txt
index c06fef09fa1105900433bd6441a99443cfa191c7..97a25d4492fe6e7634d244e78c0148cde8a3fff4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,8 +51,8 @@ django-bower
 git+https://github.com/lambdalisue/django-codemirror-widget.git
 #django-codemirror-widget
 
-# Optional, used for caching
-python-memcached
+# Optional, used for caching, requires 'libmemcached-dev' (Debian package name)
+# pylibmc
 
 # For code isolation in code questions
 docker-py