diff --git a/Theme/Backend/helper-single.tpl.php b/Theme/Backend/helper-single.tpl.php
index 554f9a0..5d1de73 100644
--- a/Theme/Backend/helper-single.tpl.php
+++ b/Theme/Backend/helper-single.tpl.php
@@ -32,7 +32,7 @@ $settings       = isset($tcoll['cfg']) ? \json_decode(\file_get_contents(__DIR__
 echo $this->getData('nav')->render(); ?>
 <div class="row" style="height: calc(100% - 85px);">
     <div class="col-xs-12 col-md-9">
-        <iframe src="<?= UriFactory::build('{/api}helper/report/export/?id=' . $template->getId()); ?>&u=<?=  $this->getData('unit'); ?>" allowfullscreen></iframe>
+        <iframe src="<?= UriFactory::build('{/api}helper/report/export/?{?}&id=' . $template->getId()); ?>&u=<?=  $this->getData('unit'); ?>" allowfullscreen></iframe>
     </div>
     <div class="col-xs-12 col-md-3">
         <section class="box wf-100">