diff --git a/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php b/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
--- a/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
+++ b/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
@@ -64,7 +64,7 @@
     $message_body = PhabricatorAuthMessage::loadMessageText(
       $recipient,
       $message_key);
-    if (strlen($message_body)) {
+    if (phutil_nonempty_string($message_body)) {
       $body[] = $this->newRemarkupText($message_body);
     }