diff --git a/app/code/Magento/CustomerGraphQl/Model/Customer/ExtractCustomerData.php b/app/code/Magento/CustomerGraphQl/Model/Customer/ExtractCustomerData.php
index 32813d44b2d41..ac074d543fec4 100644
--- a/app/code/Magento/CustomerGraphQl/Model/Customer/ExtractCustomerData.php
+++ b/app/code/Magento/CustomerGraphQl/Model/Customer/ExtractCustomerData.php
@@ -105,7 +105,9 @@ public function execute(CustomerInterface $customer): array
         $customerData['group_id'] = null;
         $customerData['model'] = $customer;
         $customerData['id'] = null;
-        $customerData['date_of_birth'] = $customerData['dob'];
+        if (!empty($customerData['dob'])) {
+            $customerData['date_of_birth'] = $customerData['dob'];
+        }
         return $customerData;
     }
 }