diff --git a/lib/internal/Magento/Framework/Xml/Security.php b/lib/internal/Magento/Framework/Xml/Security.php
index 1fade0a2aec7e0a48389168536a452559f1f0222..87c5f271a5bb5a422e4358c8d2a7541e3b713f13 100644
--- a/lib/internal/Magento/Framework/Xml/Security.php
+++ b/lib/internal/Magento/Framework/Xml/Security.php
@@ -21,7 +21,7 @@ class Security
      */
     private function heuristicScan($xmlContent)
     {
-        return strpos($xmlContent, '<!ENTITY') !== false;
+        return strpos($xmlContent, '<!ENTITY') === false;
     }
 
     /**