diff --git a/Event/Subscriber/DoctrineORMSubscriber.php b/Event/Subscriber/DoctrineORMSubscriber.php
index 4e75619..8abf958 100644
--- a/Event/Subscriber/DoctrineORMSubscriber.php
+++ b/Event/Subscriber/DoctrineORMSubscriber.php
@@ -88,7 +88,7 @@ public function filterEntity(GetFilterConditionEvent $event)
 
             if ($dqlFrom = $event->getQueryBuilder()->getDQLPart('from')) {
                 $rootPart = reset($dqlFrom);
-                $fieldName = \str_replace(\sprintf('%s.', $rootPart->getAlias()), null, $event->getField());
+                $fieldName = \str_replace(\sprintf('%s.', $rootPart->getAlias()), '', $event->getField());
                 $metadata = $queryBuilder->getEntityManager()->getClassMetadata($rootPart->getFrom());
 
                 if (isset($metadata->associationMappings[$fieldName]) && (!$metadata->associationMappings[$fieldName]['isOwningSide'] || $metadata->associationMappings[$fieldName]['type'] === ClassMetadata::MANY_TO_MANY)) {