diff --git a/app/code/Magento/Braintree/Model/Adminhtml/System/Config/CountryCreditCard.php b/app/code/Magento/Braintree/Model/Adminhtml/System/Config/CountryCreditCard.php
index 2474df84380e1..a9aa1a42d2489 100644
--- a/app/code/Magento/Braintree/Model/Adminhtml/System/Config/CountryCreditCard.php
+++ b/app/code/Magento/Braintree/Model/Adminhtml/System/Config/CountryCreditCard.php
@@ -56,6 +56,13 @@ public function __construct(
     public function beforeSave()
     {
         $value = $this->getValue();
+        if (!is_array($value)) {
+            try {
+                $value = unserialize($value);
+            } catch (\InvalidArgumentException $e) {
+                $value = [];
+            }
+        }
         $result = [];
         foreach ($value as $data) {
             if (empty($data['country_id']) || empty($data['cc_types'])) {