diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4eb2b85a1a14..9a5ddac6ac20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -219,6 +219,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/auth) [\#11482](https://github.com/cosmos/cosmos-sdk/pull/11482) Improve panic message when attempting to register a method handler for a message that does not implement sdk.Msg
 * (x/staking) [\#11596](https://github.com/cosmos/cosmos-sdk/pull/11596) Add (re)delegation getters
 * (errors) [\#11960](https://github.com/cosmos/cosmos-sdk/pull/11960) Removed 'redacted' error message from defaultErrEncoder
+* (ante) [#12013](https://github.com/cosmos/cosmos-sdk/pull/12013) Index ante events for failed tx.
 
 ### Bug Fixes
 
diff --git a/baseapp/abci.go b/baseapp/abci.go
index 1c7a36927e8b..a56fcb8d93ed 100644
--- a/baseapp/abci.go
+++ b/baseapp/abci.go
@@ -285,7 +285,7 @@ func (app *BaseApp) DeliverTx(req abci.RequestDeliverTx) abci.ResponseDeliverTx
 	gInfo, result, anteEvents, _, err := app.runTx(runTxModeDeliver, req.Tx)
 	if err != nil {
 		resultStr = "failed"
-		return sdkerrors.ResponseDeliverTxWithEvents(err, gInfo.GasWanted, gInfo.GasUsed, anteEvents, app.trace)
+		return sdkerrors.ResponseDeliverTxWithEvents(err, gInfo.GasWanted, gInfo.GasUsed, sdk.MarkEventsToIndex(anteEvents, app.indexEvents), app.trace)
 	}
 
 	return abci.ResponseDeliverTx{