diff --git a/src/Guard.php b/src/Guard.php
index 41d802c10..c0630392b 100644
--- a/src/Guard.php
+++ b/src/Guard.php
@@ -22,7 +22,7 @@ public static function getNames($model): Collection
             if (\method_exists($model, 'guardName')) {
                 $guardName = $model->guardName();
             } else {
-                $guardName = $model->guard_name ?? null;
+                $guardName = $model->getAttributeValue('guard_name');
             }
         }