diff --git a/Classes/Persistence/Generic/QueryResult.php b/Classes/Persistence/Generic/QueryResult.php
index 94ddf9bd4..9d97afda2 100644
--- a/Classes/Persistence/Generic/QueryResult.php
+++ b/Classes/Persistence/Generic/QueryResult.php
@@ -264,6 +264,7 @@ public function __wakeup()
     {
         $objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Extbase\Object\ObjectManager::class);
         $this->persistenceManager = $objectManager->get(\TYPO3\CMS\Extbase\Persistence\PersistenceManagerInterface::class);
+        $this->dataMapper = $objectManager->get(DataMapper::class);
     }
 
     /**