diff --git a/lib/Core/Search/Solr/FieldMapper/ParentChildFieldMapper.php b/lib/Core/Search/Solr/FieldMapper/ParentChildFieldMapper.php
index cf78fbe4..209747e4 100644
--- a/lib/Core/Search/Solr/FieldMapper/ParentChildFieldMapper.php
+++ b/lib/Core/Search/Solr/FieldMapper/ParentChildFieldMapper.php
@@ -94,7 +94,7 @@ private function recursiveMapFields(
         bool $doIndex = true,
     ): array {
         $fieldsGrouped = [[]];
-        $isIndexed = !isset($configuration['indexed']) || (bool) $configuration['indexed'];
+        $isIndexed = !isset($configuration['indexed']) || $configuration['indexed'];
         $childrenConfiguration = $configuration['children'] ?? [];
 
         if ($isIndexed && $doIndex) {