diff --git a/framework/Yii.php b/framework/Yii.php
index 1e4efbbf14..6ea4f31ad4 100644
--- a/framework/Yii.php
+++ b/framework/Yii.php
@@ -23,5 +23,5 @@ class Yii extends \yii\BaseYii
 }
 
 spl_autoload_register(['Yii', 'autoload'], true, true);
-Yii::$classMap = include(__DIR__ . '/classes.php');
+Yii::$classMap = require(__DIR__ . '/classes.php');
 Yii::$container = new yii\di\Container;