diff --git a/core/types/transaction_marshalling.go b/core/types/transaction_marshalling.go
index 39eb207628..892b48ec20 100644
--- a/core/types/transaction_marshalling.go
+++ b/core/types/transaction_marshalling.go
@@ -51,7 +51,7 @@ type txJSON struct {
 	Hash common.Hash `json:"hash"`
 
 	// L1 message transaction fields:
-	Sender     common.Address  `json:"sender,omitempty"`
+	Sender     *common.Address `json:"sender,omitempty"`
 	QueueIndex *hexutil.Uint64 `json:"queueIndex,omitempty"`
 }
 
@@ -153,7 +153,7 @@ func (tx *Transaction) MarshalJSON() ([]byte, error) {
 		enc.To = tx.To()
 		enc.Value = (*hexutil.Big)(itx.Value)
 		enc.Input = (*hexutil.Bytes)(&itx.Data)
-		enc.Sender = itx.Sender
+		enc.Sender = &itx.Sender
 	}
 	return json.Marshal(&enc)
 }
@@ -438,7 +438,10 @@ func (tx *Transaction) UnmarshalJSON(input []byte) error {
 			return errors.New("missing required field 'input' in transaction")
 		}
 		itx.Data = *dec.Input
-		itx.Sender = dec.Sender
+		if dec.Sender == nil {
+			return errors.New("missing required field 'sender' in transaction")
+		}
+		itx.Sender = *dec.Sender
 
 	default:
 		return ErrTxTypeNotSupported
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index dcec75f93c..439b8a6f2d 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1518,7 +1518,7 @@ type RPCTransaction struct {
 	YParity             *hexutil.Uint64   `json:"yParity,omitempty"`
 
 	// L1 message transaction fields:
-	Sender     common.Address  `json:"sender,omitempty"`
+	Sender     *common.Address `json:"sender,omitempty"`
 	QueueIndex *hexutil.Uint64 `json:"queueIndex,omitempty"`
 }
 
@@ -1597,7 +1597,7 @@ func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber
 
 	case types.L1MessageTxType:
 		msg := tx.AsL1MessageTx()
-		result.Sender = msg.Sender
+		result.Sender = &msg.Sender
 		result.QueueIndex = (*hexutil.Uint64)(&msg.QueueIndex)
 	}
 	return result