diff --git a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
index 27b9c7cb9d..820402d9d2 100644
--- a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
+++ b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
@@ -64,6 +64,11 @@ final class PhpDocTypeHelper
                 continue;
             }
 
+            if ($type instanceof Nullable) {
+                $nullable = true;
+                $type = $type->getActualType();
+            }
+
             $varTypes[] = $type;
         }