diff --git a/Mapping/ClassMetadataFactory.php b/Mapping/ClassMetadataFactory.php
index c84cfd2d7..a04a16ab5 100644
--- a/Mapping/ClassMetadataFactory.php
+++ b/Mapping/ClassMetadataFactory.php
@@ -5,7 +5,6 @@
 use Doctrine\ORM\Id\AbstractIdGenerator;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Mapping\ClassMetadataFactory as BaseClassMetadataFactory;
-use Doctrine\ORM\Mapping\ClassMetadataInfo;
 
 use function assert;
 
@@ -18,10 +17,6 @@ protected function doLoadMetadata($class, $parent, $rootEntityFound, array $nonS
     {
         parent::doLoadMetadata($class, $parent, $rootEntityFound, $nonSuperclassParents);
 
-        if (! $class instanceof ClassMetadataInfo) {
-            return;
-        }
-
         $customGeneratorDefinition = $class->customGeneratorDefinition;
 
         if (! isset($customGeneratorDefinition['instance'])) {