diff --git a/module/VuFind/src/VuFind/RecordDriver/SolrDefault.php b/module/VuFind/src/VuFind/RecordDriver/SolrDefault.php
index 766a5c5896f4b47a7fc3b574d43d81473f196a0b..1d40ee493ba51c96efd371bd771464393bac6e7b 100644
--- a/module/VuFind/src/VuFind/RecordDriver/SolrDefault.php
+++ b/module/VuFind/src/VuFind/RecordDriver/SolrDefault.php
@@ -1922,7 +1922,10 @@ class SolrDefault extends AbstractBase
         $query = new \VuFindSearch\Query\Query(
             'hierarchy_parent_id:"' . $safeId . '"'
         );
-        return $this->searchService->search('Solr', $query, 0, 0)->getTotal();
+        // Disable highlighting for efficiency; not needed here:
+        $params = new \VuFindSearch\ParamBag(['hl' => ['false']]);
+        return $this->searchService->search('Solr', $query, 0, 0, $params)
+            ->getTotal();
     }
 
     /**