diff --git a/core/types/transaction.go b/core/types/transaction.go
index 934feb7353..ee90dded73 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -49,6 +49,7 @@ const (
 	DynamicFeeTxType = 0x02
 	BlobTxType       = 0x03
 	SetCodeTxType    = 0x04
+	L1MessageTxType  = 0x7e
 )
 
 // Transaction is an Ethereum transaction.
diff --git a/core/types/transaction_marshalling.go b/core/types/transaction_marshalling.go
index f76d4b92e9..42f11a8766 100644
--- a/core/types/transaction_marshalling.go
+++ b/core/types/transaction_marshalling.go
@@ -507,6 +507,9 @@ func (tx *Transaction) UnmarshalJSON(input []byte) error {
 			}
 		}
 
+	case L1MessageTxType:
+		return nil
+
 	default:
 		return ErrTxTypeNotSupported
 	}