diff --git a/dev/tools/Magento/Tools/Migration/System/Configuration/Mapper.php b/dev/tools/Magento/Tools/Migration/System/Configuration/Mapper.php
index 863435e917339..ff05a3c35f0f1 100644
--- a/dev/tools/Magento/Tools/Migration/System/Configuration/Mapper.php
+++ b/dev/tools/Magento/Tools/Migration/System/Configuration/Mapper.php
@@ -37,7 +37,7 @@ public function __construct(
     public function transform(array $config)
     {
         $output = [];
-        $output['comment'] = $config['comment'];
+        $output['comment'] = isset($config['comment']) ? $config['comment'] : '';
 
         $tabsConfig = isset($config['tabs']) ? $config['tabs'] : [];
         $sectionsConfig = isset($config['sections']) ? $config['sections'] : [];