diff --git a/core/components/magicpreview/processors/resource/PreviewTrait.php b/core/components/magicpreview/processors/resource/PreviewTrait.php
index 239e7be..ac3e129 100644
--- a/core/components/magicpreview/processors/resource/PreviewTrait.php
+++ b/core/components/magicpreview/processors/resource/PreviewTrait.php
@@ -23,7 +23,7 @@ public function fireBeforeSaveEvent()
             foreach ($tvs as $tv) {
                 $this->object->set($tv->get('name'), [
                     $tv->get('name'),
-                    $this->object->get('tv' . $tv->get('id')),
+                    $this->modx->getObject('modTemplateVar', $tv->get('id'))->renderOutput($this->object->get('id')),
                     $tv->get('display'),
                     $tv->get('display_params'),
                     $tv->get('type'),
@@ -58,4 +58,4 @@ public function saveObject()
     {
         return false;
     }
-}
\ No newline at end of file
+}