diff --git a/aspnetcore/mvc/advanced/custom-formatters.md b/aspnetcore/mvc/advanced/custom-formatters.md
index 1c98550c23..a67e8274fc 100644
--- a/aspnetcore/mvc/advanced/custom-formatters.md
+++ b/aspnetcore/mvc/advanced/custom-formatters.md
@@ -91,6 +91,8 @@ To use a custom formatter, add an instance of the formatter class to the `InputF
 
 [!code-csharp[Main](custom-formatters/sample/Startup.cs?name=mvcoptions&highlight=3-4)]
 
+Formatters are evaluated in the order you insert them. The first one takes precedence. 
+
 ## Next steps
 
 See the [sample application](https://github.com/aspnet/Docs/tree/master/aspnetcore/mvc/advanced/custom-formatters/Sample), which implements simple vCard input and output formatters.  The application reads and writes vCards that look like the following example:
diff --git a/aspnetcore/mvc/advanced/custom-formatters/Sample/Startup.cs b/aspnetcore/mvc/advanced/custom-formatters/Sample/Startup.cs
index d8bf05c605..0f9974af68 100644
--- a/aspnetcore/mvc/advanced/custom-formatters/Sample/Startup.cs
+++ b/aspnetcore/mvc/advanced/custom-formatters/Sample/Startup.cs
@@ -29,8 +29,8 @@ namespace CustomFormatterDemo
             #region mvcoptions
             services.AddMvc(options =>
             {
-                options.InputFormatters.Add(new VcardInputFormatter());
-                options.OutputFormatters.Add(new VcardOutputFormatter());
+                options.InputFormatters.Insert(0, new VcardInputFormatter());
+                options.OutputFormatters.Insert(0, new VcardInputFormatter());
             });
             #endregion