diff --git a/app/code/Magento/Quote/Model/CustomerManagement.php b/app/code/Magento/Quote/Model/CustomerManagement.php
index d2b2bb58159bf..00898fc6edec7 100644
--- a/app/code/Magento/Quote/Model/CustomerManagement.php
+++ b/app/code/Magento/Quote/Model/CustomerManagement.php
@@ -162,6 +162,7 @@ public function validateAddresses(QuoteEntity $quote)
         if (empty($addresses) && $quote->getCustomerIsGuest()) {
             $billingAddress = $quote->getBillingAddress();
             $customerAddress = $this->customerAddressFactory->create();
+            $customerAddress->setPrefix($billingAddress?->getPrefix());
             $customerAddress->setFirstname($billingAddress->getFirstname());
             $customerAddress->setMiddlename($billingAddress?->getMiddlename());
             $customerAddress->setLastname($billingAddress->getLastname());