diff --git a/app/Listeners/LogAuthenticationFailure.php b/app/Listeners/LogAuthenticationFailure.php
index 979c2e3..3ce94c7 100644
--- a/app/Listeners/LogAuthenticationFailure.php
+++ b/app/Listeners/LogAuthenticationFailure.php
@@ -27,7 +27,7 @@ class LogAuthenticationFailure
     public function handle($event)
     {
         Log::alert('SECURITY (login): Detected failed authentication attempt!', [
-            'targetAccountID' => $event->user->id,
+            'targetAccountID' => $event->user->id ?? '(nonexistent user)',
             'sourceIP' => request()->ip(),
             'matchesAccountLastIP' => request()->ip() == $event->user->originalIP,
             'sourceUserAgent' => request()->userAgent(),