diff --git a/app/bootstrap.php b/app/bootstrap.php
index 315f3cba0db6b..cff388e40a25a 100644
--- a/app/bootstrap.php
+++ b/app/bootstrap.php
@@ -88,7 +88,7 @@
     require_once BP . '/lib/Magento/Autoload/ClassMap.php';
     $classMap = new Magento_Autoload_ClassMap(BP);
     $classMap->addMap(unserialize(file_get_contents($classMapPath)));
-    spl_autoload_register(array($classMap, 'load'));
+    spl_autoload_register(array($classMap, 'load'), true, true);
 }
 
 $definitionsFile = BP . DS . 'var/di/definitions.php';