diff --git a/sandbox/functions-recipes/includes/routes-prefixes.md b/sandbox/functions-recipes/includes/routes-prefixes.md
index f5fd8e1a..c27866d9 100644
--- a/sandbox/functions-recipes/includes/routes-prefixes.md
+++ b/sandbox/functions-recipes/includes/routes-prefixes.md
@@ -4,8 +4,10 @@ By default Azure Functions has a route prefix on all functions /api/. To change
 
 ```json
 {
-  "http": {
-    "routePrefix": ""
+  "extensions": {
+    "http": {
+      "routePrefix": ""
+    }
   }
 }
 ```
@@ -18,4 +20,4 @@ This would turn http://yourUrl/api/Example into http://yourUrl/Example.
 
 [!include[](../includes/read-more-heading.md)]
 
-- [More on host.json](https://github.com/Azure/azure-webjobs-sdk-script/wiki/host.json)
\ No newline at end of file
+- [More on host.json](https://github.com/Azure/azure-webjobs-sdk-script/wiki/host.json)