1 files changed, 1 insertions, 1 deletions
diff --git a/src/DotNetOpenAuth.OAuth/OAuth/Messages/UnauthorizedTokenResponse.cs b/src/DotNetOpenAuth.OAuth/OAuth/Messages/UnauthorizedTokenResponse.cs
index adfed6a..9e879cd 100644
--- a/src/DotNetOpenAuth.OAuth/OAuth/Messages/UnauthorizedTokenResponse.cs
+++ b/src/DotNetOpenAuth.OAuth/OAuth/Messages/UnauthorizedTokenResponse.cs
@@ -8,8 +8,8 @@ namespace DotNetOpenAuth.OAuth.Messages {
 	using System;
 	using System.Collections.Generic;
 	using System.Diagnostics.CodeAnalysis;
-	using System.Diagnostics.Contracts;
 	using DotNetOpenAuth.Messaging;
+	using Validation;
 
 	/// <summary>
 	/// A direct message sent from Service Provider to Consumer in response to