diff --git a/README.md b/README.md
index 962ac6e..d68e634 100644
--- a/README.md
+++ b/README.md
@@ -101,8 +101,9 @@ var options = {
   "datePrefix": '__DATE:',
   "fieldValueDelete": "__DELETE",
   "fieldValueServerTimestamp" : "__SERVERTIMESTAMP",
-  "persist": true,
-  "config" : {}
+  "persist": true
+  // Use config to add custom app configuration, don't use empty config
+  // "config": {}
 };
 
 if (cordova.platformId === "browser") {