1 files changed, 1 insertions, 1 deletions
diff --git a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
index 049430a..a5de08b 100644
--- a/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
+++ b/src/DotNetOpenAuth.OpenId.RelyingParty/OpenId/RelyingParty/Extensions/UIUtilities.cs
@@ -6,10 +6,10 @@
 
 namespace DotNetOpenAuth.OpenId.RelyingParty.Extensions.UI {
 	using System;
-	using System.Diagnostics.Contracts;
 	using System.Globalization;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.RelyingParty;
+	using Validation;
 
 	/// <summary>
 	/// Constants used in implementing support for the UI extension.