diff --git a/src/applications/settings/panel/PhabricatorSettingsPanelEmailAddresses.php b/src/applications/settings/panel/PhabricatorSettingsPanelEmailAddresses.php
--- a/src/applications/settings/panel/PhabricatorSettingsPanelEmailAddresses.php
+++ b/src/applications/settings/panel/PhabricatorSettingsPanelEmailAddresses.php
@@ -211,7 +211,7 @@
 
           return id(new AphrontDialogResponse())->setDialog($dialog);
         } catch (AphrontDuplicateKeyQueryException $ex) {
-          $email = pht('Duplicate');
+          $e_email = pht('Duplicate');
           $errors[] = pht('Another user already has this email.');
         }
       }