diff --git a/samples/appcache-tiles.html b/samples/appcache-tiles.html
index c5c6521..1541af7 100644
--- a/samples/appcache-tiles.html
+++ b/samples/appcache-tiles.html
@@ -11,6 +11,9 @@ This sample demonstrates using an application manifest to store tiles locally.
 The use cases for using this sample are to ensure you can reload and restart you application
 one it is offline.
 
+It is strongly recommended that you use your own optimized build of the ArcGIS API for JavaScript
+using the Web Optimizer: http://jso.arcgis.com/
+
 Use the included Grunt task to help generate the manifest file. There is manual
 work involved in determining which files need to go into the manifest. The included manifest
 file should work with this sample to give you an idea of what goes into the manifest.