diff --git a/src/applications/auth/controller/PhabricatorAuthController.php b/src/applications/auth/controller/PhabricatorAuthController.php
index 697d306252..9212c4c49c 100644
--- a/src/applications/auth/controller/PhabricatorAuthController.php
+++ b/src/applications/auth/controller/PhabricatorAuthController.php
@@ -158,7 +158,7 @@ abstract class PhabricatorAuthController extends PhabricatorController {
     }
 
     if ($account->getUserPHID()) {
-      if ($account->getUserPHID() != $viewer->getUserPHID()) {
+      if ($account->getUserPHID() != $viewer->getPHID()) {
         $response = $this->renderError(
           pht(
             'The account you are attempting to register or link is already '.