diff --git a/Classes/Query/FilterEncoder/QueryGroup.php b/Classes/Query/FilterEncoder/QueryGroup.php
index <HASH>..<HASH> 100644
--- a/Classes/Query/FilterEncoder/QueryGroup.php
+++ b/Classes/Query/FilterEncoder/QueryGroup.php
@@ -25,6 +25,7 @@ namespace ApacheSolrForTypo3\Solr\Query\FilterEncoder;
  ***************************************************************/
 
 use ApacheSolrForTypo3\Solr\Facet\FacetBuilder;
+use ApacheSolrForTypo3\Solr\System\Configuration\TypoScriptConfiguration;
 use ApacheSolrForTypo3\Solr\Util;
 
 /**
@@ -36,6 +37,13 @@ class QueryGroup implements FilterEncoder, FacetBuilder
 {
 
     /**
+     * TypoScript configuration of tx_solr
+     *
+     * @var TypoScriptConfiguration
+     */
+    protected $configuration = null;
+
+    /**
      * Constructor
      *
      */
[TASK] Fix scrutinizer issues in QueryGroup