diff --git a/src/vs/base/node/pfs.ts b/src/vs/base/node/pfs.ts
index 42e7a5447a6..6172b9a30ad 100644
--- a/src/vs/base/node/pfs.ts
+++ b/src/vs/base/node/pfs.ts
@@ -99,6 +99,7 @@ const writeFilePathQueue: { [path: string]: Queue<void> } = Object.create(null);
 
 export function writeFile(path: string, data: string, options?: extfs.IWriteFileOptions): TPromise<void>;
 export function writeFile(path: string, data: NodeBuffer, options?: extfs.IWriteFileOptions): TPromise<void>;
+export function writeFile(path: string, data: Uint8Array, options?: extfs.IWriteFileOptions): TPromise<void>;
 export function writeFile(path: string, data: NodeJS.ReadableStream, options?: extfs.IWriteFileOptions): TPromise<void>;
 export function writeFile(path: string, data: any, options?: extfs.IWriteFileOptions): TPromise<void> {
 	const queueKey = toQueueKey(path);
diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 0c2c16c0ea9..8afaaa63c6c 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -7,7 +7,7 @@
 import { Emitter } from 'vs/base/common/event';
 import { TernarySearchTree } from 'vs/base/common/map';
 import { score } from 'vs/editor/common/modes/languageSelector';
-import * as Platform from 'vs/base/common/platform';
+import * as platform from 'vs/base/common/platform';
 import * as errors from 'vs/base/common/errors';
 import product from 'vs/platform/node/product';
 import pkg from 'vs/platform/node/package';
@@ -220,7 +220,7 @@ export function createApiFactory(
 		const env: typeof vscode.env = Object.freeze({
 			get machineId() { return initData.telemetryInfo.machineId; },
 			get sessionId() { return initData.telemetryInfo.sessionId; },
-			get language() { return Platform.language; },
+			get language() { return platform.language; },
 			get appName() { return product.nameLong; },
 			get appRoot() { return initData.environment.appRoot; },
 			get logLevel() { return extHostLogService.getLevel(); }