diff --git a/src/Microsoft.AspNet.Mvc.Extensions/Formatters/IJsonOutputFormatter.cs b/src/Microsoft.AspNet.Mvc.Extensions/Formatters/IJsonOutputFormatter.cs
deleted file mode 100644
index 8f165fad0d..0000000000
--- a/src/Microsoft.AspNet.Mvc.Extensions/Formatters/IJsonOutputFormatter.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) .NET Foundation. All rights reserved.
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-namespace Microsoft.AspNet.Mvc
-{
-    /// <summary>
-    /// An output formatter that specializes in writing JSON content.
-    /// </summary>
-    /// <remarks>
-    /// The <see cref="JsonResult"/> class filter the collection of
-    /// <see cref="MvcOptions.OutputFormatters"/> and use only those which implement
-    /// <see cref="IJsonOutputFormatter"/>.
-    ///
-    /// To create a custom formatter that can be used by <see cref="JsonResult"/>, derive from
-    /// <see cref="JsonOutputFormatter"/> or implement <see cref="IJsonOutputFormatter"/>.
-    /// </remarks>
-    public interface IJsonOutputFormatter : IOutputFormatter
-    {
-    }
-}
\ No newline at end of file
diff --git a/src/Microsoft.AspNet.Mvc.Extensions/Formatters/JsonOutputFormatter.cs b/src/Microsoft.AspNet.Mvc.Extensions/Formatters/JsonOutputFormatter.cs
index 3819da2799..27ce61ab5c 100644
--- a/src/Microsoft.AspNet.Mvc.Extensions/Formatters/JsonOutputFormatter.cs
+++ b/src/Microsoft.AspNet.Mvc.Extensions/Formatters/JsonOutputFormatter.cs
@@ -11,7 +11,18 @@ using Newtonsoft.Json;
 
 namespace Microsoft.AspNet.Mvc
 {
-    public class JsonOutputFormatter : OutputFormatter, IJsonOutputFormatter
+    /// <summary>
+    /// An output formatter that specializes in writing JSON content.
+    /// </summary>
+    /// <remarks>
+    /// The <see cref="JsonResult"/> class filter the collection of
+    /// <see cref="MvcOptions.OutputFormatters"/> and use only those of type
+    /// <see cref="JsonOutputFormatter"/>.
+    ///
+    /// To create a custom formatter that can be used by <see cref="JsonResult"/>, derive from
+    /// <see cref="JsonOutputFormatter"/>.
+    /// </remarks>
+    public class JsonOutputFormatter : OutputFormatter
     {
         private JsonSerializerSettings _serializerSettings;
 
diff --git a/src/Microsoft.AspNet.Mvc.Extensions/JsonResult.cs b/src/Microsoft.AspNet.Mvc.Extensions/JsonResult.cs
index c600ddb23e..dc036ce5be 100644
--- a/src/Microsoft.AspNet.Mvc.Extensions/JsonResult.cs
+++ b/src/Microsoft.AspNet.Mvc.Extensions/JsonResult.cs
@@ -130,7 +130,7 @@ namespace Microsoft.AspNet.Mvc
                     .GetRequiredService<IOptions<MvcOptions>>()
                     .Options
                     .OutputFormatters
-                    .OfType<IJsonOutputFormatter>()
+                    .OfType<JsonOutputFormatter>()
                     .ToArray();
 
                 var formatter = objectResult.SelectFormatter(formatterContext, formatters);