diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35b1de3fe282..bcd76df24e06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * (x/feegrant) [\#11813](https://github.com/cosmos/cosmos-sdk/pull/11813) Fix pagination total count in `AllowancesByGranter` query.
 * (errors) [\#12002](https://github.com/cosmos/cosmos-sdk/pull/12002) Removed 'redacted' error message from defaultErrEncoder.
+* (ante) [#12017](https://github.com/cosmos/cosmos-sdk/pull/12017) Index ante events for failed tx (backport #12013).
 
 ### Bug Fixes
 
diff --git a/baseapp/abci.go b/baseapp/abci.go
index e46259ec9ee3..74999a629d69 100644
--- a/baseapp/abci.go
+++ b/baseapp/abci.go
@@ -276,7 +276,7 @@ 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{