diff --git a/tm2/pkg/bft/abci/types/types.go b/tm2/pkg/bft/abci/types/types.go
index 21926cad5372..e1fbc4760ec8 100644
--- a/tm2/pkg/bft/abci/types/types.go
+++ b/tm2/pkg/bft/abci/types/types.go
@@ -206,7 +206,7 @@ type Error interface {
 
 type Event interface {
 	AssertABCIEvent()
-	SetMsgIdx(int) interface{}
+	ID() []byte
 }
 
 type Header interface {