When configuring memcached as cache.engine, also configure SESSION_ENGINE
diff --git a/horizon/files/horizon_settings/_local_settings.py b/horizon/files/horizon_settings/_local_settings.py
index 14b317c..fc0c946 100644
--- a/horizon/files/horizon_settings/_local_settings.py
+++ b/horizon/files/horizon_settings/_local_settings.py
@@ -26,6 +26,10 @@
SECRET_KEY = '{{ app.secret_key }}'
+{% if app.cache.get('engine', 'signed_cookies') == 'memcached' %}
+SESSION_ENGINE = 'django.contrib.sessions.backends.cache'
+{% endif %}
+
CACHES = {
'default': {