diff --git a/rpc/utxo.go b/rpc/utxo.go
index 625a248bd..d668a1f21 100644
--- a/rpc/utxo.go
+++ b/rpc/utxo.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 
 	"github.com/MixinNetwork/mixin/common"
+	"github.com/MixinNetwork/mixin/crypto"
 )
 
 func GetUTXO(rpc, hash string, index uint64) (*common.UTXOWithLock, error) {
@@ -11,10 +12,28 @@ func GetUTXO(rpc, hash string, index uint64) (*common.UTXOWithLock, error) {
 	if err != nil {
 		return nil, err
 	}
-	var out common.UTXOWithLock
+	var out struct {
+		Type     uint8          `json:"type"`
+		Hash     crypto.Hash    `json:"hash"`
+		Index    uint           `json:"index"`
+		Amount   common.Integer `json:"amount"`
+		Keys     []*crypto.Key  `json:"keys"`
+		Script   common.Script  `json:"script"`
+		Mask     *crypto.Key    `json:"mask"`
+		LockHash crypto.Hash    `json:"lock"`
+	}
 	err = json.Unmarshal(data, &out)
 	if err != nil {
 		panic(string(data))
 	}
-	return &out, err
+
+	utxo := &common.UTXOWithLock{LockHash: out.LockHash}
+	utxo.Type = out.Type
+	utxo.Hash = out.Hash
+	utxo.Index = out.Index
+	utxo.Amount = out.Amount
+	utxo.Keys = out.Keys
+	utxo.Script = out.Script
+	utxo.Mask = *out.Mask
+	return utxo, nil
 }