diff --git a/Event/Subscriber/DoctrineORMSubscriber.php b/Event/Subscriber/DoctrineORMSubscriber.php
index 3db9776..cb42cca 100644
--- a/Event/Subscriber/DoctrineORMSubscriber.php
+++ b/Event/Subscriber/DoctrineORMSubscriber.php
@@ -78,7 +78,7 @@ public function filterEntity(GetFilterConditionEvent $event)
 
             if ($dqlFrom = $event->getQueryBuilder()->getDQLPart('from')) {
                 $rootPart = reset($dqlFrom);
-                $fieldName = ltrim($event->getField(), $rootPart->getAlias() . '.');
+                $fieldName = substr($event->getField(), strlen($rootPart->getAlias.'.'));
                 $metadata = $queryBuilder->getEntityManager()->getClassMetadata($rootPart->getFrom());
 
                 if (isset($metadata->associationMappings[$fieldName]) && (!$metadata->associationMappings[$fieldName]['isOwningSide'] || $metadata->associationMappings[$fieldName]['type'] === ClassMetadataInfo::MANY_TO_MANY)) {