diff --git a/docs/cache.txt b/docs/cache.txt
index d8d028b558..9f50e45511 100644
--- a/docs/cache.txt
+++ b/docs/cache.txt
@@ -57,7 +57,7 @@ arguments are:
 
 For example::
 
-    DB_CACHE = "memcached://127.0.0.1:11211/?timeout=60"
+    CACHE_BACKEND = "memcached://127.0.0.1:11211/?timeout=60"
 
 Invalid arguments are silently ignored, as are invalid values of known
 arguments.