diff --git a/txnbuild/CHANGELOG.md b/txnbuild/CHANGELOG.md
index 82839d1711..0e3f776a49 100644
--- a/txnbuild/CHANGELOG.md
+++ b/txnbuild/CHANGELOG.md
@@ -11,10 +11,10 @@ file.  This project adheres to [Semantic Versioning](http://semver.org/).
 * Muxed accounts and ID memos can be used in the `BuildChallengeTx()` and `ReadChallengeTx()` SEP-10 utilitiy functions to identify users of shared Stellar accounts. ([#4746](https://github.com/stellar/go/pull/4746))
   * `BuildChallengeTx()`:
     * Muxed account addresses can be passed as the `clientAccountID`.
-    * Adds an additional parameter of type `txnbuild.Memo`. Memos must be of type ID and cannot be specified if the `clientAccoutID` id a muxed account address.
+    * Adds an additional parameter of type `*txnbuild.MemoID`. Memos cannot be specified if the `clientAccoutID` id a muxed account address.
   * `ReadChallengeTx()`:
     * Muxed account addresses may be returned as the `clientAccountID`.
-    * Adds an additional return value of type `txnbuild.Memo`, which if non-nil, will always be a memo of type ID.
+    * Adds an additional return value of type `*txnbuild.MemoID`.
 
 
 ## [10.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v9.0.0) - 2022-04-18