diff --git a/module/VuFind/src/VuFind/View/Helper/Root/SortFacetList.php b/module/VuFind/src/VuFind/View/Helper/Root/SortFacetList.php
index 2740ccdf5c2..30ce81db080 100644
--- a/module/VuFind/src/VuFind/View/Helper/Root/SortFacetList.php
+++ b/module/VuFind/src/VuFind/View/Helper/Root/SortFacetList.php
@@ -65,7 +65,8 @@ public function __invoke($results, $field, $list, $searchRoute)
         $urlHelper = $this->getView()->plugin('url');
         foreach ($list as $value) {
             $url = $urlHelper($searchRoute) . $results->getUrlQuery()
-                ->addFacet($field, $value['value'])->getParams();
+                ->addFacet($field, $value['value'], ($value['operator'] ?? 'AND'))
+                ->getParams();
             $facets[$url] = $value['displayText'];
         }
         $this->getSorter()->natsort($facets);