diff --git a/lib/internal/Magento/Framework/Webapi/Rest/Response/Renderer/Xml.php b/lib/internal/Magento/Framework/Webapi/Rest/Response/Renderer/Xml.php
index b4cfc61611a93..f25cd219e3eae 100644
--- a/lib/internal/Magento/Framework/Webapi/Rest/Response/Renderer/Xml.php
+++ b/lib/internal/Magento/Framework/Webapi/Rest/Response/Renderer/Xml.php
@@ -7,6 +7,9 @@
  */
 namespace Magento\Framework\Webapi\Rest\Response\Renderer;
 
+/**
+ * Renders response data in Xml format.
+ */
 class Xml implements \Magento\Framework\Webapi\Rest\Response\RendererInterface
 {
     /**
@@ -111,8 +114,7 @@ protected function _formatValue($value)
             /** Without the following transformation boolean values are rendered incorrectly */
             $value = $value ? 'true' : 'false';
         }
-        $replacementMap = ['&' => '&'];
-        return str_replace(array_keys($replacementMap), array_values($replacementMap), $value);
+        return (string) $value;
     }
 
     /**
diff --git a/lib/internal/Magento/Framework/Webapi/Test/Unit/Rest/Response/Renderer/XmlTest.php b/lib/internal/Magento/Framework/Webapi/Test/Unit/Rest/Response/Renderer/XmlTest.php
index 396fbcdb1978b..71fb41491cc74 100644
--- a/lib/internal/Magento/Framework/Webapi/Test/Unit/Rest/Response/Renderer/XmlTest.php
+++ b/lib/internal/Magento/Framework/Webapi/Test/Unit/Rest/Response/Renderer/XmlTest.php
@@ -76,6 +76,11 @@ public function providerXmlRender()
                 '<?xml version="1.0"?><response><item_7key>value</item_7key></response>',
                 'Invalid XML render with numeric symbol in data index.'
             ],
+            [
+                ['key' => 'test & foo'],
+                '<?xml version="1.0"?><response><key>test &amp; foo</key></response>',
+                'Invalid XML render with ampersand symbol in data index.'
+            ],
             [
                 ['.key' => 'value'],
                 '<?xml version="1.0"?><response><item_key>value</item_key></response>',