diff --git a/aspnetcore/mvc/models/model-binding.md b/aspnetcore/mvc/models/model-binding.md
index d7448bf0b7..b265b1c389 100644
--- a/aspnetcore/mvc/models/model-binding.md
+++ b/aspnetcore/mvc/models/model-binding.md
@@ -342,7 +342,10 @@ For targets that are collections of simple types, model binding looks for matche
   [a]=1050&[b]=2000&index=a&index=b
   ```
 
-<!-- STUB: Make same change here -->
+ Avoid binding a parameter or a property named `index` or `Index` if it is adjacent to a collection value. Model binding attempts to use `index` as the index for the collection which might result in incorrect binding. For example, consider the following action:
+  
+  ```csharp
+  public IActionResult Post(string index, List<Product> products)
 * The following format is supported only in form data:
 
   ```