diff --git a/clientgui/WizardAttach.cpp b/clientgui/WizardAttach.cpp
index c985ad09021..b4126c4fd37 100644
--- a/clientgui/WizardAttach.cpp
+++ b/clientgui/WizardAttach.cpp
@@ -613,7 +613,7 @@ void CWizardAttach::OnFinished( wxWizardExEvent& event ) {
     } else {
         // Attached to a project
         if (GetAccountCreatedSuccessfully() && GetAttachedToProjectSuccessfully()) {
-            wxLaunchDefaultBrowser(GetProjectURL() + wxT("account_finish.php?auth=") + GetProjectAuthenticator());
+            wxLaunchDefaultBrowser(GetProjectURL() + wxT("account_finish.php"));
         }
     }
 
diff --git a/html/user/account_finish.php b/html/user/account_finish.php
index c8f8f4ab3e2..69b445eeffe 100644
--- a/html/user/account_finish.php
+++ b/html/user/account_finish.php
@@ -24,13 +24,7 @@
 require_once('../inc/util.inc');
 require_once('../inc/countries.inc');
 
-check_get_args(array("auth"));
-
-$auth = get_str("auth");
-$user = BoincUser::lookup_auth($auth);
-if (!$user) {
-    error_page("no such account");
-}
+$user = get_logged_in_user();
 page_head(tra("Finish account setup"));
 
 echo "
@@ -58,7 +52,6 @@
 );
 end_table();
 echo "
-    <input type=hidden name=auth value=$auth>
     </form>
 ";