diff --git a/templates/proxy/cache.conf.erb b/templates/proxy/cache.conf.erb
index 70c707c6..6348fd02 100644
--- a/templates/proxy/cache.conf.erb
+++ b/templates/proxy/cache.conf.erb
@@ -1,3 +1,3 @@
 [filter:cache]
 use = egg:swift#memcache
-memcache_servers = <%= memcache_servers.to_a.join(',') %>
+memcache_servers = <%= [memcache_servers].flatten.join(',') %>