diff --git a/rippled-example.cfg b/rippled-example.cfg
index a4173c6ce..8f760c3e6 100644
--- a/rippled-example.cfg
+++ b/rippled-example.cfg
@@ -233,6 +233,7 @@
 #       HyperLevelDB        Use an improved version of LevelDB (preferred)
 #       LevelDB             Use Google's LevelDB database (deprecated)
 #       MDB                 Use MDB
+#       none                Use no backend
 #       KeyvaDB             Use OpenCoin's KeyvaDB (experimental)
 #   Required keys:
 #       path                Location to store the database (all types)