diff --git a/lib/internal/Magento/Framework/ObjectManager/Definition/Compiled.php b/lib/internal/Magento/Framework/ObjectManager/Definition/Compiled.php
index 2c4e68ff0dca3..3c7f9343a14a5 100644
--- a/lib/internal/Magento/Framework/ObjectManager/Definition/Compiled.php
+++ b/lib/internal/Magento/Framework/ObjectManager/Definition/Compiled.php
@@ -18,15 +18,15 @@ abstract class Compiled implements \Magento\Framework\ObjectManager\DefinitionIn
     protected $_definitions;
 
     /**
-     * @var \Magento\Framework\Code\Reader\ClassReader
+     * @var \Magento\Framework\Code\Reader\ClassReaderInterface
      */
     protected $reader ;
 
     /**
      * @param array $definitions
-     * @param \Magento\Framework\Code\Reader\ClassReader $reader
+     * @param \Magento\Framework\Code\Reader\ClassReaderInterface $reader
      */
-    public function __construct(array $definitions, \Magento\Framework\Code\Reader\ClassReader $reader = null)
+    public function __construct(array $definitions, \Magento\Framework\Code\Reader\ClassReaderInterface $reader = null)
     {
         list($this->_signatures, $this->_definitions) = $definitions;
         $this->reader = $reader ?: new \Magento\Framework\Code\Reader\ClassReader();
diff --git a/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php b/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
index 452b6c3c86edb..4f4aa5713f90f 100644
--- a/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
+++ b/lib/internal/Magento/Framework/ObjectManager/Definition/Runtime.php
@@ -15,9 +15,9 @@ class Runtime implements \Magento\Framework\ObjectManager\DefinitionInterface
     protected $_definitions = [];
 
     /**
-     * @param \Magento\Framework\Code\Reader\ClassReader $reader
+     * @param \Magento\Framework\Code\Reader\ClassReaderInterface $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();
     }
diff --git a/lib/internal/Magento/Framework/ObjectManager/Relations/Runtime.php b/lib/internal/Magento/Framework/ObjectManager/Relations/Runtime.php
index d7b87843488cb..b8b39d25fb56f 100644
--- a/lib/internal/Magento/Framework/ObjectManager/Relations/Runtime.php
+++ b/lib/internal/Magento/Framework/ObjectManager/Relations/Runtime.php
@@ -8,7 +8,7 @@
 class Runtime implements \Magento\Framework\ObjectManager\RelationsInterface
 {
     /**
-     * @var \Magento\Framework\Code\Reader\ClassReader
+     * @var \Magento\Framework\Code\Reader\ClassReaderInterface
      */
     protected $_classReader;
 
@@ -20,9 +20,9 @@ class Runtime implements \Magento\Framework\ObjectManager\RelationsInterface
     protected $_default = [];
 
     /**
-     * @param \Magento\Framework\Code\Reader\ClassReader $classReader
+     * @param \Magento\Framework\Code\Reader\ClassReaderInterface $classReader
      */
-    public function __construct(\Magento\Framework\Code\Reader\ClassReader $classReader = null)
+    public function __construct(\Magento\Framework\Code\Reader\ClassReaderInterface $classReader = null)
     {
         $this->_classReader = $classReader ?: new \Magento\Framework\Code\Reader\ClassReader();
     }