diff --git a/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs b/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
index 7192412d..2a4d1961 100644
--- a/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableAuthorizationsClient.cs
@@ -107,7 +107,7 @@ namespace Octokit.Reactive
             Ensure.ArgumentNotNull(newAuthorization, "authorization");
             Ensure.ArgumentNotNullOrEmptyString(twoFactorAuthenticationCode, "twoFactorAuthenticationCode");
 
-            return _client.Create(clientId, clientSecret, newAuthorization).ToObservable();
+            return _client.Create(clientId, clientSecret, newAuthorization, twoFactorAuthenticationCode).ToObservable();
         }
 
         /// <summary>