diff --git a/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php b/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
index 452b6c3c86edb..9ab06b9c17097 100644
--- a/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
+++ b/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
@@ -17,7 +17,7 @@ class Runtime implements \Magento\Framework\ObjectManager\DefinitionInterface
     /**
      * @param \Magento\Framework\Code\Reader\ClassReader $reader
      */
-    public function __construct(\Magento\Framework\Code\Reader\ClassReader $reader = null)
+    public function __construct(\Magento\Framework\Code\Reader\ClassReaderInterface $reader = null)
     {
         $this->_reader = $reader ?: new \Magento\Framework\Code\Reader\ClassReader();
     }