diff --git a/web3.js/module.d.ts b/web3.js/module.d.ts
index e90c245667..63b4d966b1 100644
--- a/web3.js/module.d.ts
+++ b/web3.js/module.d.ts
@@ -403,7 +403,7 @@ declare module '@solana/web3.js' {
         Transaction | TransactionInstruction | TransactionInstructionCtorFields
       >
     ): Transaction;
-    signData: Buffer;
+    serializeMessage(): Buffer;
     sign(...signers: Array<Account>): void;
     signPartial(...partialSigners: Array<PublicKey | Account>): void;
     addSignature(pubkey: PublicKey, signature: Buffer): void;
diff --git a/web3.js/module.flow.js b/web3.js/module.flow.js
index 93e98719f4..c9021da70c 100644
--- a/web3.js/module.flow.js
+++ b/web3.js/module.flow.js
@@ -411,7 +411,7 @@ declare module '@solana/web3.js' {
         Transaction | TransactionInstruction | TransactionInstructionCtorFields,
       >
     ): Transaction;
-    signData: Buffer;
+    serializeMessage(): Buffer;
     sign(...signers: Array<Account>): void;
     signPartial(...partialSigners: Array<PublicKey | Account>): void;
     addSigner(signer: Account): void;
diff --git a/web3.js/src/transaction.js b/web3.js/src/transaction.js
index bf66d801b4..4762ff6412 100644
--- a/web3.js/src/transaction.js
+++ b/web3.js/src/transaction.js
@@ -182,7 +182,7 @@ export class Transaction {
   /**
    * Get a buffer of the Transaction data that need to be covered by signatures
    */
-  get signData(): Buffer {
+  serializeMessage(): Buffer {
     const {nonceInfo} = this;
     if (nonceInfo && this.instructions[0] != nonceInfo.nonceInstruction) {
       this.recentBlockhash = nonceInfo.nonce;
@@ -377,7 +377,7 @@ export class Transaction {
       },
     );
     this.signatures = signatures;
-    const signData = this.signData;
+    const signData = this.serializeMessage();
 
     partialSigners.forEach((accountOrPublicKey, index) => {
       if (accountOrPublicKey instanceof PublicKey) {
@@ -398,7 +398,7 @@ export class Transaction {
    * `signPartial`
    */
   addSigner(signer: Account) {
-    const signData = this.signData;
+    const signData = this.serializeMessage();
     const signature = nacl.sign.detached(signData, signer.secretKey);
     this.addSignature(signer.publicKey, signature);
   }
@@ -424,7 +424,7 @@ export class Transaction {
    */
   verifySignatures(): boolean {
     let verified = true;
-    const signData = this.signData;
+    const signData = this.serializeMessage();
     for (const {signature, publicKey} of this.signatures) {
       if (
         !nacl.sign.detached.verify(signData, signature, publicKey.toBuffer())
@@ -446,7 +446,7 @@ export class Transaction {
       throw new Error('Transaction has not been signed');
     }
 
-    const signData = this.signData;
+    const signData = this.serializeMessage();
     const signatureCount = [];
     shortvec.encodeLength(signatureCount, signatures.length);
     const transactionLength =
diff --git a/web3.js/test/transaction.test.js b/web3.js/test/transaction.test.js
index 68a10b30ce..ece8961bc6 100644
--- a/web3.js/test/transaction.test.js
+++ b/web3.js/test/transaction.test.js
@@ -453,7 +453,7 @@ test('get sign data for transaction', () => {
     lamports: 42,
   });
   tx.recentBlockhash = bs58.encode(recentBlockhash);
-  const tx_bytes = tx.signData;
+  const tx_bytes = tx.serializeMessage();
   const signature = nacl.sign.detached(tx_bytes, from.secretKey);
   tx.addSignature(from.publicKey, signature);
   expect(tx.verifySignatures()).toBe(true);