diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -4105,7 +4105,7 @@
     'PhabricatorPeopleDisableController' => 'applications/people/controller/PhabricatorPeopleDisableController.php',
     'PhabricatorPeopleEmailLoginMailEngine' => 'applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php',
     'PhabricatorPeopleEmpowerController' => 'applications/people/controller/PhabricatorPeopleEmpowerController.php',
-    'PhabricatorPeopleExternalIdentifierPHIDType' => 'applications/people/phid/PhabricatorPeopleExternalIdentiferPHIDType.php',
+    'PhabricatorPeopleExternalIdentifierPHIDType' => 'applications/people/phid/PhabricatorPeopleExternalIdentifierPHIDType.php',
     'PhabricatorPeopleExternalPHIDType' => 'applications/people/phid/PhabricatorPeopleExternalPHIDType.php',
     'PhabricatorPeopleIconSet' => 'applications/people/icon/PhabricatorPeopleIconSet.php',
     'PhabricatorPeopleInviteController' => 'applications/people/controller/PhabricatorPeopleInviteController.php',
diff --git a/src/applications/auth/controller/PhabricatorAuthController.php b/src/applications/auth/controller/PhabricatorAuthController.php
--- a/src/applications/auth/controller/PhabricatorAuthController.php
+++ b/src/applications/auth/controller/PhabricatorAuthController.php
@@ -197,22 +197,6 @@
       return array($account, $provider, $response);
     }
 
-    $other_account = id(new PhabricatorExternalAccount())->loadAllWhere(
-      'accountType = %s AND accountDomain = %s AND accountID = %s
-        AND id != %d',
-      $account->getAccountType(),
-      $account->getAccountDomain(),
-      $account->getAccountID(),
-      $account->getID());
-
-    if ($other_account) {
-      $response = $this->renderError(
-        pht(
-          'The account you are attempting to register with already belongs '.
-          'to another user.'));
-      return array($account, $provider, $response);
-    }
-
     $config = $account->getProviderConfig();
     if (!$config->getIsEnabled()) {
       $response = $this->renderError(