diff --git a/websocket-sharp/Net/HttpListenerAsyncResult.cs b/websocket-sharp/Net/HttpListenerAsyncResult.cs
index 77707667..286082b4 100644
--- a/websocket-sharp/Net/HttpListenerAsyncResult.cs
+++ b/websocket-sharp/Net/HttpListenerAsyncResult.cs
@@ -115,8 +115,9 @@ namespace WebSocketSharp.Net
         return true;
 
       var req = context.Request;
+      var authRes = req.Headers["Authorization"];
+
       if (schm == AuthenticationSchemes.Basic) {
-        var authRes = req.Headers["Authorization"];
         if (authRes == null || !authRes.StartsWith ("basic", StringComparison.OrdinalIgnoreCase)) {
           context.Response.CloseWithAuthChallenge (
             AuthenticationChallenge.CreateBasicChallenge (listener.Realm).ToBasicString ());
@@ -125,7 +126,6 @@ namespace WebSocketSharp.Net
         }
       }
       else if (schm == AuthenticationSchemes.Digest) {
-        var authRes = req.Headers["Authorization"];
         if (authRes == null || !authRes.StartsWith ("digest", StringComparison.OrdinalIgnoreCase)) {
           context.Response.CloseWithAuthChallenge (
             AuthenticationChallenge.CreateDigestChallenge (listener.Realm).ToDigestString ());
@@ -139,7 +139,7 @@ namespace WebSocketSharp.Net
       }
 
       var realm = listener.Realm;
-      context.SetUser (schm, realm, listener.UserCredentialsFinder);
+      context.SetUser (authRes, schm, realm, listener.UserCredentialsFinder);
       if (req.IsAuthenticated)
         return true;
 
diff --git a/websocket-sharp/Net/HttpListenerContext.cs b/websocket-sharp/Net/HttpListenerContext.cs
index 7b37a272..fad63d70 100644
--- a/websocket-sharp/Net/HttpListenerContext.cs
+++ b/websocket-sharp/Net/HttpListenerContext.cs
@@ -44,8 +44,8 @@ using WebSocketSharp.Net.WebSockets;
 namespace WebSocketSharp.Net
 {
   /// <summary>
-  /// Provides a set of methods and properties used to access the HTTP request and response
-  /// information used by the <see cref="HttpListener"/>.
+  /// Provides the access to the HTTP request and response information
+  /// used by the <see cref="HttpListener"/>.
   /// </summary>
   /// <remarks>
   /// The HttpListenerContext class cannot be inherited.
@@ -160,15 +160,16 @@ namespace WebSocketSharp.Net
     #region Internal Methods
 
     internal void SetUser (
+      string response,
       AuthenticationSchemes scheme,
       string realm,
       Func<IIdentity, NetworkCredential> credentialsFinder)
     {
-      var authRes = AuthenticationResponse.Parse (_request.Headers ["Authorization"]);
-      if (authRes == null)
+      var res = AuthenticationResponse.Parse (response);
+      if (res == null)
         return;
 
-      var id = authRes.ToIdentity ();
+      var id = res.ToIdentity ();
       if (id == null)
         return;