diff --git a/src/IncomingEntry.php b/src/IncomingEntry.php
index 2dc3fba4a..43bf38233 100644
--- a/src/IncomingEntry.php
+++ b/src/IncomingEntry.php
@@ -135,7 +135,7 @@ public function user($user)
             ],
         ]);
 
-        $this->tags(['Auth:'.$user->getKey()]);
+        $this->tags(['Auth:'.$user->getAuthIdentifier()]);
 
         return $this;
     }