diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index 04b8c45528..dd29d80d27 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -464,14 +464,8 @@ export class Connection {
   async sendRawTransaction(
     rawTransaction: Buffer,
   ): Promise<TransactionSignature> {
-    // sendTransaction RPC API requires a u64 length field prepended to the raw
-    // Transaction bytes
-    const rpcTransaction = Buffer.alloc(8 + rawTransaction.length);
-    rpcTransaction.writeUInt32LE(rawTransaction.length, 0);
-    rawTransaction.copy(rpcTransaction, 8);
-
     const unsafeRes = await this._rpcRequest('sendTransaction', [
-      [...rpcTransaction],
+      [...rawTransaction],
     ]);
     const res = SendTransactionRpcResult(unsafeRes);
     if (res.error) {