diff --git a/app/code/Magento/Eav/Model/Resource/Entity/Attribute.php b/app/code/Magento/Eav/Model/Resource/Entity/Attribute.php
index fcdfbd0700fae..bccdc3d2933f4 100644
--- a/app/code/Magento/Eav/Model/Resource/Entity/Attribute.php
+++ b/app/code/Magento/Eav/Model/Resource/Entity/Attribute.php
@@ -206,6 +206,7 @@ protected function _beforeSave(AbstractModel $object)
     {
         $frontendLabel = $object->getFrontendLabel();
         if (is_array($frontendLabel)) {
+            $frontendLabel = array_values($frontendLabel);
             if (!isset($frontendLabel[0]) || is_null($frontendLabel[0]) || $frontendLabel[0] == '') {
                 throw new \Magento\Core\Exception(__('Frontend label is not defined'));
             }