diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 3e29290622032..a3637969e81e0 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1290,7 +1290,7 @@ func newRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber
 	switch tx.Type() {
 	case types.LegacyTxType:
 		// if a legacy transaction has an EIP-155 chain id, include it explicitly
-		if id := tx.ChainId(); id.Sign() == 0 {
+		if id := tx.ChainId(); id.Sign() != 0 {
 			result.ChainID = (*hexutil.Big)(id)
 		}
 	case types.AccessListTxType: