diff --git a/client/tx_config.go b/client/tx_config.go
index 5c5fd2695e40..2b319fa6cab8 100644
--- a/client/tx_config.go
+++ b/client/tx_config.go
@@ -13,6 +13,7 @@ type (
 	TxEncodingConfig interface {
 		TxEncoder() sdk.TxEncoder
 		TxDecoder() sdk.TxDecoder
+		SetTxDecoder(sdk.TxDecoder)
 		TxJSONEncoder() sdk.TxEncoder
 		TxJSONDecoder() sdk.TxDecoder
 		MarshalSignatureJSON([]signingtypes.SignatureV2) ([]byte, error)
diff --git a/x/auth/migrations/legacytx/stdtx_builder.go b/x/auth/migrations/legacytx/stdtx_builder.go
index 35d26ce02e1f..a2577772dbfd 100644
--- a/x/auth/migrations/legacytx/stdtx_builder.go
+++ b/x/auth/migrations/legacytx/stdtx_builder.go
@@ -115,6 +115,10 @@ func (s StdTxConfig) TxDecoder() sdk.TxDecoder {
 	return mkDecoder(s.Cdc.Unmarshal)
 }
 
+func (s StdTxConfig) SetTxDecoder(t sdk.TxDecoder) {
+	// no-op
+}
+
 func (s StdTxConfig) TxJSONEncoder() sdk.TxEncoder {
 	return func(tx sdk.Tx) ([]byte, error) {
 		return s.Cdc.MarshalJSON(tx)
diff --git a/x/auth/tx/config.go b/x/auth/tx/config.go
index 78b78a9dd8b6..dd1dfe8e1226 100644
--- a/x/auth/tx/config.go
+++ b/x/auth/tx/config.go
@@ -67,6 +67,10 @@ func (g config) TxDecoder() sdk.TxDecoder {
 	return g.decoder
 }
 
+func (g *config) SetTxDecoder(decoder sdk.TxDecoder) {
+	g.decoder = decoder
+}
+
 func (g config) TxJSONEncoder() sdk.TxEncoder {
 	return g.jsonEncoder
 }