diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c475fd7ce..3a1cec6e39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (client) [#23860](https://github.com/cosmos/cosmos-sdk/pull/23860) Add missing `unordered` field for legacy amino signing of tx body.
 * (x/bank) [#23836](https://github.com/cosmos/cosmos-sdk/pull/23836) Fix `DenomMetadata` rpc allow value with slashes.
 * (query) [87d3a43](https://github.com/cosmos/cosmos-sdk/commit/87d3a432af95f4cf96aa02351ed5fcc51cca6e7b) Fix collection filtered pagination.
 
diff --git a/client/tx/aux_builder.go b/client/tx/aux_builder.go
index 3b4639220f..7730de5a6b 100644
--- a/client/tx/aux_builder.go
+++ b/client/tx/aux_builder.go
@@ -223,6 +223,7 @@ func (b *AuxTxBuilder) GetSignBytes() ([]byte, error) {
 				Memo:             body.Memo,
 				TimeoutHeight:    body.TimeoutHeight,
 				TimeoutTimestamp: body.TimeoutTimestamp,
+				Unordered:        body.Unordered,
 				// AuxTxBuilder has no concern with extension options, so we set them to nil.
 				// This preserves pre-PR#16025 behavior where extension options were ignored, this code path:
 				// https://github.com/cosmos/cosmos-sdk/blob/ac3c209326a26b46f65a6cc6f5b5ebf6beb79b38/client/tx/aux_builder.go#L193