diff --git a/Classes/Domain/Search/ApacheSolrDocument/Builder.php b/Classes/Domain/Search/ApacheSolrDocument/Builder.php
index 181ed214a..0639a0dfc 100644
--- a/Classes/Domain/Search/ApacheSolrDocument/Builder.php
+++ b/Classes/Domain/Search/ApacheSolrDocument/Builder.php
@@ -58,7 +58,7 @@ public function fromPage(
         $pageRecord = $pageInformation->getPageRecord();
 
         $document = GeneralUtility::makeInstance(Document::class);
-        $site = $this->getSiteByPageId($pageId);
+        $site = $this->getSiteByPageId($tsfe->rootLine[0]['uid'] ?? $pageId);
 
         $accessGroups = $this->getDocumentIdGroups($pageAccessRootline);
         $documentId = $this->getPageDocumentId($pageInformation, $pageArguments, $siteLanguage, $accessGroups, $mountPointParameter);