diff --git a/src/vs/platform/log/common/bufferLog.ts b/src/vs/platform/log/common/bufferLog.ts
index bdf382bd1e1..32a1f521891 100644
--- a/src/vs/platform/log/common/bufferLog.ts
+++ b/src/vs/platform/log/common/bufferLog.ts
@@ -7,7 +7,7 @@ import { ILogService, LogLevel, AbstractLogService, DEFAULT_LOG_LEVEL } from 'vs
 
 interface ILog {
 	level: LogLevel;
-	args: IArguments;
+	args: any[];
 }
 
 function getLogFunction(logger: ILogService, level: LogLevel): Function {
@@ -49,7 +49,7 @@ export class BufferLogService extends AbstractLogService implements ILogService
 		this.buffer = [];
 	}
 
-	private _log(level: LogLevel, args: IArguments): void {
+	private _log(level: LogLevel, ...args: any[]): void {
 		if (this._logger) {
 			const fn = getLogFunction(this._logger, level);
 			fn.apply(this._logger, args);
@@ -58,28 +58,28 @@ export class BufferLogService extends AbstractLogService implements ILogService
 		}
 	}
 
-	trace(): void {
-		this._log(LogLevel.Trace, arguments);
+	trace(message: string, ...args: any[]): void {
+		this._log(LogLevel.Trace, message, ...args);
 	}
 
-	debug(): void {
-		this._log(LogLevel.Debug, arguments);
+	debug(message: string, ...args: any[]): void {
+		this._log(LogLevel.Debug, message, ...args);
 	}
 
-	info(): void {
-		this._log(LogLevel.Info, arguments);
+	info(message: string, ...args: any[]): void {
+		this._log(LogLevel.Info, message, ...args);
 	}
 
-	warn(): void {
-		this._log(LogLevel.Warning, arguments);
+	warn(message: string, ...args: any[]): void {
+		this._log(LogLevel.Warning, message, ...args);
 	}
 
-	error(): void {
-		this._log(LogLevel.Error, arguments);
+	error(message: string | Error, ...args: any[]): void {
+		this._log(LogLevel.Error, message, ...args);
 	}
 
-	critical(): void {
-		this._log(LogLevel.Critical, arguments);
+	critical(message: string | Error, ...args: any[]): void {
+		this._log(LogLevel.Critical, message, ...args);
 	}
 
 	dispose(): void {
diff --git a/src/vs/workbench/browser/web.main.ts b/src/vs/workbench/browser/web.main.ts
index 9b9097e5015..bad3b51b81f 100644
--- a/src/vs/workbench/browser/web.main.ts
+++ b/src/vs/workbench/browser/web.main.ts
@@ -216,8 +216,8 @@ class BrowserMain extends Disposable {
 
 				fileService.registerProvider(logsPath.scheme, indexedDBLogProvider);
 			} catch (error) {
-				(<ILogService>logService).info('Error while creating indexedDB log provider. Falling back to in-memory log provider.');
-				(<ILogService>logService).error(error);
+				logService.info('Error while creating indexedDB log provider. Falling back to in-memory log provider.');
+				logService.error(error);
 
 				fileService.registerProvider(logsPath.scheme, new InMemoryLogProvider(logsPath.scheme));
 			}