diff --git a/src/vs/platform/update/electron-main/auto-updater.win32.ts b/src/vs/platform/update/electron-main/auto-updater.win32.ts
index 9ef3644e35ca3b2a5013027a1e41023995613585..2add374a83acdfd2c26f3835a21277c860c52935 100644
--- a/src/vs/platform/update/electron-main/auto-updater.win32.ts
+++ b/src/vs/platform/update/electron-main/auto-updater.win32.ts
@@ -7,6 +7,7 @@
 
 import { localize } from 'vs/nls';
 import * as path from 'path';
+import * as fs from 'fs';
 import * as pfs from 'vs/base/node/pfs';
 import { checksum } from 'vs/base/node/crypto';
 import { EventEmitter } from 'events';
@@ -21,7 +22,7 @@ import { IAutoUpdater } from 'vs/platform/update/common/update';
 import product from 'vs/platform/node/product';
 import { IStorageService } from 'vs/platform/storage/node/storage';
 import { dialog } from 'electron';
-import { getUpdateFeedUrl } from './updateFeedUrl';
+import { getUpdateFeedUrl, Win32UninstallPath } from './updateFeedUrl';
 
 interface IUpdate {
 	url: string;
@@ -182,6 +183,19 @@ export class Win32AutoUpdaterImpl extends EventEmitter implements IAutoUpdater {
 			return;
 		}
 
+		if (process.arch === 'ia32' && this.arch === 'x64') {
+			const updatePackageContents = `@echo off\r\n"${Win32UninstallPath} /silent"\r\nstart /b "" "${this.updatePackagePath}" /silent /mergetasks=runcode,!desktopicon,!quicklaunchicon\r\n`;
+			const updatePackagePath = path.join(tmpdir(), 'vscode-update-32-to-64.bat');
+			fs.writeFileSync(updatePackagePath, updatePackageContents);
+
+			spawn('cmd.exe', [updatePackagePath], {
+				detached: true,
+				stdio: ['ignore', 'ignore', 'ignore']
+			});
+
+			return;
+		}
+
 		spawn(this.updatePackagePath, ['/silent', '/mergetasks=runcode,!desktopicon,!quicklaunchicon'], {
 			detached: true,
 			stdio: ['ignore', 'ignore', 'ignore']
diff --git a/src/vs/platform/update/electron-main/updateFeedUrl.ts b/src/vs/platform/update/electron-main/updateFeedUrl.ts
index 78dcd2ccc72d926a251a47cd3a1f0007139c5083..57c56b974cb2164b190e367a4b7041992a7aa1fb 100644
--- a/src/vs/platform/update/electron-main/updateFeedUrl.ts
+++ b/src/vs/platform/update/electron-main/updateFeedUrl.ts
@@ -9,12 +9,14 @@ import * as fs from 'original-fs';
 import * as path from 'path';
 import product from 'vs/platform/node/product';
 
+export const Win32UninstallPath = path.join(path.dirname(process.execPath), 'unins000.exe');
+
 export function getUpdateFeedUrl(channel: string, arch: string = process.arch): string {
 	if (!channel) {
 		return null;
 	}
 
-	if (process.platform === 'win32' && !fs.existsSync(path.join(path.dirname(process.execPath), 'unins000.exe'))) {
+	if (process.platform === 'win32' && !fs.existsSync(Win32UninstallPath)) {
 		return null;
 	}