diff --git a/app/code/Magento/Sales/Api/Data/OrderPaymentInterface.php b/app/code/Magento/Sales/Api/Data/OrderPaymentInterface.php
index cb28a2e2c4661..e8822de76d9da 100644
--- a/app/code/Magento/Sales/Api/Data/OrderPaymentInterface.php
+++ b/app/code/Magento/Sales/Api/Data/OrderPaymentInterface.php
@@ -261,7 +261,7 @@ public function getAdditionalData();
     /**
      * Gets the additional information for the order payment.
      *
-     * @return string[] Array of additional information.
+     * @return array|null|mixed Array of additional information.
      */
     public function getAdditionalInformation();
 
diff --git a/app/code/Magento/Sales/Api/Data/TransactionInterface.php b/app/code/Magento/Sales/Api/Data/TransactionInterface.php
index c32ccfac1f3b1..41527c6271f5c 100644
--- a/app/code/Magento/Sales/Api/Data/TransactionInterface.php
+++ b/app/code/Magento/Sales/Api/Data/TransactionInterface.php
@@ -154,7 +154,7 @@ public function getIsClosed();
     /**
      * Gets any additional information for the transaction.
      *
-     * @return string[]|null Array of additional information. Otherwise, null.
+     * @return array|null|mixed Array of additional information. Otherwise, null.
      */
     public function getAdditionalInformation();