diff --git a/web3.js/module.flow.js b/web3.js/module.flow.js
index 3297a3f97a..340466ea1a 100644
--- a/web3.js/module.flow.js
+++ b/web3.js/module.flow.js
@@ -35,8 +35,8 @@ declare module '@solana/web3.js' {
   // === src/connection.js ===
   declare export type AccountInfo = {
     executable: boolean,
-    loaderProgramId: PublicKey,
-    programId: PublicKey,
+    loader: PublicKey,
+    owner: PublicKey,
     tokens: number,
     userdata: Buffer,
   };
diff --git a/web3.js/src/connection.js b/web3.js/src/connection.js
index 3a88867342..490ee7296e 100644
--- a/web3.js/src/connection.js
+++ b/web3.js/src/connection.js
@@ -82,8 +82,8 @@ function jsonRpcResult(resultDescription: any) {
  */
 const AccountInfoResult = struct({
   executable: 'boolean',
-  loader_program_id: 'array',
-  program_id: 'array',
+  loader: 'array',
+  owner: 'array',
   tokens: 'number',
   userdata: 'array',
 });
@@ -149,12 +149,15 @@ const SendTokensRpcResult = jsonRpcResult('string');
  *
  * @typedef {Object} AccountInfo
  * @property {number} tokens Number of tokens assigned to the account
- * @property {PublicKey} programId Identifier of the program assigned to the account
+ * @property {PublicKey} owner Identifier of the program that owns the account
  * @property {?Buffer} userdata Optional userdata assigned to the account
+ * @property {PublicKey} loader Identifier of the loader for this account
+ * @property {boolean} executable `true` if this account's userdata contains a loaded program
  */
 type AccountInfo = {
   executable: boolean,
-  programId: PublicKey,
+  loader: PublicKey,
+  owner: PublicKey,
   tokens: number,
   userdata: Buffer,
 };
@@ -268,9 +271,9 @@ export class Connection {
 
     return {
       executable: result.executable,
+      loader: new PublicKey(result.loader),
+      owner: new PublicKey(result.owner),
       tokens: result.tokens,
-      programId: new PublicKey(result.program_id),
-      loaderProgramId: new PublicKey(result.loader_program_id),
       userdata: Buffer.from(result.userdata),
     };
   }
@@ -474,9 +477,9 @@ export class Connection {
 
         sub.callback({
           executable: result.executable,
+          loader: new PublicKey(result.loader),
+          owner: new PublicKey(result.owner),
           tokens: result.tokens,
-          programId: new PublicKey(result.program_id),
-          loaderProgramId: new PublicKey(result.loader_program_id),
           userdata: Buffer.from(result.userdata),
         });
         return true;
diff --git a/web3.js/src/token-program.js b/web3.js/src/token-program.js
index 51f0a48130..129684129a 100644
--- a/web3.js/src/token-program.js
+++ b/web3.js/src/token-program.js
@@ -305,9 +305,9 @@ export class Token {
    */
   async tokenInfo(): Promise<TokenInfo> {
     const accountInfo = await this.connection.getAccountInfo(this.token);
-    if (!accountInfo.programId.equals(this.programId)) {
+    if (!accountInfo.owner.equals(this.programId)) {
       throw new Error(
-        `Invalid token programId: ${JSON.stringify(accountInfo.programId)}`,
+        `Invalid token owner: ${JSON.stringify(accountInfo.owner)}`,
       );
     }
 
@@ -328,8 +328,8 @@ export class Token {
    */
   async accountInfo(account: PublicKey): Promise<TokenAccountInfo> {
     const accountInfo = await this.connection.getAccountInfo(account);
-    if (!accountInfo.programId.equals(this.programId)) {
-      throw new Error(`Invalid token account programId`);
+    if (!accountInfo.owner.equals(this.programId)) {
+      throw new Error(`Invalid token account owner`);
     }
 
     const userdata = Buffer.from(accountInfo.userdata);
diff --git a/web3.js/test/connection.test.js b/web3.js/test/connection.test.js
index 1bde515f67..ab71502820 100644
--- a/web3.js/test/connection.test.js
+++ b/web3.js/test/connection.test.js
@@ -197,7 +197,7 @@ test('request airdrop', async () => {
     {
       error: null,
       result: {
-        program_id: [
+        owner: [
           0,
           0,
           0,
@@ -234,7 +234,7 @@ test('request airdrop', async () => {
         tokens: 42,
         userdata: [],
         executable: false,
-        loader_program_id: [
+        loader: [
           0,
           0,
           0,
@@ -275,7 +275,7 @@ test('request airdrop', async () => {
   const accountInfo = await connection.getAccountInfo(account.publicKey);
   expect(accountInfo.tokens).toBe(42);
   expect(accountInfo.userdata).toHaveLength(0);
-  expect(accountInfo.programId).toEqual(SystemProgram.programId);
+  expect(accountInfo.owner).toEqual(SystemProgram.programId);
 });
 
 test('transaction', async () => {
@@ -521,7 +521,7 @@ test('account change notification', async () => {
   expect(mockCallback.mock.calls[0][0].userdata).toEqual(
     Buffer.from([0, 0, 0]),
   );
-  expect(mockCallback.mock.calls[0][0].programId).toEqual(BpfLoader.programId);
+  expect(mockCallback.mock.calls[0][0].owner).toEqual(BpfLoader.programId);
 
   // Second mockCallback call is due to loader.load()
   expect(mockCallback.mock.calls[1][0].userdata).toEqual(
diff --git a/web3.js/test/token-program.test.js b/web3.js/test/token-program.test.js
index f6de1a0abb..8bcd3db1f2 100644
--- a/web3.js/test/token-program.test.js
+++ b/web3.js/test/token-program.test.js
@@ -95,7 +95,7 @@ test('create new token', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             1,
@@ -140,7 +140,7 @@ test('create new token', async () => {
             84,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -197,7 +197,7 @@ test('create new token', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -245,7 +245,7 @@ test('create new token', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -322,7 +322,7 @@ test('create new token account', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -339,7 +339,7 @@ test('create new token account', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -416,7 +416,7 @@ test('transfer', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -433,7 +433,7 @@ test('transfer', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -477,12 +477,7 @@ test('transfer', async () => {
     mockGetSignatureStatus();
   }
 
-  await testToken.transfer(
-    initialOwner,
-    initialOwnerTokenAccount,
-    dest,
-    123,
-  );
+  await testToken.transfer(initialOwner, initialOwnerTokenAccount, dest, 123);
 
   {
     // mock Token.accountInfo()'s getAccountInfo
@@ -495,7 +490,7 @@ test('transfer', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -512,7 +507,7 @@ test('transfer', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -601,7 +596,7 @@ test('approve/revoke', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -627,7 +622,7 @@ test('approve/revoke', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,
@@ -698,7 +693,7 @@ test('approve/revoke', async () => {
       {
         error: null,
         result: {
-          program_id: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
+          owner: [...SYSTEM_TOKEN_PROGRAM_ID.toBuffer()],
           tokens: 1,
           userdata: [
             2,
@@ -724,7 +719,7 @@ test('approve/revoke', async () => {
             0,
           ],
           executable: false,
-          loader_program_id: [
+          loader: [
             0,
             0,
             0,