diff --git a/README.md b/README.md
index ab6a19e..7786982 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,6 @@ const config = parse({
 
 ```javascript
 const config = parse({
-  elasticHost: defaultTo(string())
+  elasticHost: defaultTo(string(), 'default value')
 });
 ```