diff --git a/module/VuFind/src/VuFind/Search/Solr/Explanation.php b/module/VuFind/src/VuFind/Search/Solr/Explanation.php
index e5c241061a2..a639d167e1f 100644
--- a/module/VuFind/src/VuFind/Search/Solr/Explanation.php
+++ b/module/VuFind/src/VuFind/Search/Solr/Explanation.php
@@ -252,10 +252,8 @@ public function performRequest($recordId)
         $params->set('spellcheck', 'false');
         $explainParams = new ParamBag([
             'fl' => 'id,score',
-            'facet' => 'true',
             'debug' => 'true',
             'indent' => 'true',
-            'param' => 'q',
             'echoParams' => 'all',
             'explainOther' => 'id:"' . addcslashes($recordId, '"') . '"',
         ]);