diff --git a/inc/fields/dropdownfield.class.php b/inc/fields/dropdownfield.class.php
index af5cefc9b..fcda3998f 100644
--- a/inc/fields/dropdownfield.class.php
+++ b/inc/fields/dropdownfield.class.php
@@ -284,7 +284,7 @@ public function getRenderedHtml($canEdit = true) {
          if (isset($emptyItem->fields['otherserial'])) {
             $dparams['displaywith'][] = 'otherserial';
          }
-         $itemtype::dropdown($dparams);
+         $html .= $itemtype::dropdown($dparams + ['display' => false]);
       }
       $html .= PHP_EOL;
       $html .= Html::scriptBlock("$(function() {