diff --git a/core/types/transaction_marshalling.go b/core/types/transaction_marshalling.go
index 8e3db617703a5..070927484cc7c 100644
--- a/core/types/transaction_marshalling.go
+++ b/core/types/transaction_marshalling.go
@@ -69,9 +69,6 @@ func (tx *Transaction) MarshalJSON() ([]byte, error) {
 		enc.V = (*hexutil.Big)(itx.V)
 		enc.R = (*hexutil.Big)(itx.R)
 		enc.S = (*hexutil.Big)(itx.S)
-		if tx.Protected() {
-			enc.ChainID = (*hexutil.Big)(tx.ChainId())
-		}
 
 	case *AccessListTx:
 		enc.ChainID = (*hexutil.Big)(itx.ChainID)