diff --git a/src/vs/platform/environment/common/environment.ts b/src/vs/platform/environment/common/environment.ts
index 423e5642f7a2eebbc631c9cbb31fb85c6fea9f95..e6f5d25bce31a7df419580c5bd374d46c9ff4ec5 100644
--- a/src/vs/platform/environment/common/environment.ts
+++ b/src/vs/platform/environment/common/environment.ts
@@ -25,8 +25,7 @@ export interface IEnvironmentService {
 	extensionDevelopmentPath: string;
 	extensionTestsPath: string;
 
-	debugExtensionHostPort: number;
-	debugBrkExtensionHost: boolean;
+	debugExtensionHost: { port: number; break: boolean; };
 
 	logExtensionHostCommunication: boolean;
 
diff --git a/src/vs/platform/environment/node/environmentService.ts b/src/vs/platform/environment/node/environmentService.ts
index 7b3cc67e9649b6619c93ed92b5c996e35051d7d5..1f811f124e976c06be04c727a389a94caa6fc0a5 100644
--- a/src/vs/platform/environment/node/environmentService.ts
+++ b/src/vs/platform/environment/node/environmentService.ts
@@ -24,7 +24,6 @@ export class EnvironmentService implements IEnvironmentService {
 
 	@memoize
 	get appRoot(): string { return path.dirname(URI.parse(require.toUrl('')).fsPath); }
-
 	get execPath(): string { return this.args.execPath; }
 
 	@memoize
@@ -51,10 +50,8 @@ export class EnvironmentService implements IEnvironmentService {
 	get disableExtensions(): boolean { return this.args['disable-extensions'];  }
 
 	@memoize
-	private get parsedDebugExtensionHost(): { port: number; brk: boolean; } { return parseExtensionHostPort(this.args, this.isBuilt); }
+	get debugExtensionHost(): { port: number; break: boolean; } { return parseExtensionHostPort(this.args, this.isBuilt); }
 
-	get debugExtensionHostPort(): number { return this.parsedDebugExtensionHost.port; }
-	get debugBrkExtensionHost(): boolean { return this.parsedDebugExtensionHost.brk; }
 	get isBuilt(): boolean { return !process.env['VSCODE_DEV']; }
 	get verbose(): boolean { return this.args.verbose; }
 	get performance(): boolean { return this.args.performance; }
@@ -63,9 +60,9 @@ export class EnvironmentService implements IEnvironmentService {
 	constructor(private args: IEnvironment) {}
 }
 
-export function parseExtensionHostPort(args: ParsedArgs, isBuild: boolean): { port: number; brk: boolean; } {
+export function parseExtensionHostPort(args: ParsedArgs, isBuild: boolean): { port: number; break: boolean; } {
 	const portStr = args.debugBrkPluginHost || args.debugPluginHost;
 	const port = Number(portStr) || (!isBuild ? 5870 : null);
 	const brk = port ? Boolean(!!args.debugBrkPluginHost) : false;
-	return { port, brk };
+	return { port, break: brk };
 }
\ No newline at end of file
diff --git a/src/vs/workbench/services/thread/electron-browser/threadService.ts b/src/vs/workbench/services/thread/electron-browser/threadService.ts
index 3e1aa9bb0a04cc814b26dc8a5fcc366bfbf188df..20bc1026c51950121645c6ecc4f1f443337c1297 100644
--- a/src/vs/workbench/services/thread/electron-browser/threadService.ts
+++ b/src/vs/workbench/services/thread/electron-browser/threadService.ts
@@ -113,8 +113,8 @@ class ExtensionHostProcessManager {
 
 		// handle extension host lifecycle a bit special when we know we are developing an extension that runs inside
 		this.isExtensionDevelopmentHost = !!environmentService.extensionDevelopmentPath;
-		this.isExtensionDevelopmentDebugging = !!environmentService.debugBrkExtensionHost;
-		this.isExtensionDevelopmentTestFromCli = this.isExtensionDevelopmentHost && !!environmentService.extensionTestsPath && !environmentService.debugBrkExtensionHost;
+		this.isExtensionDevelopmentDebugging = !!environmentService.debugExtensionHost.break;
+		this.isExtensionDevelopmentTestFromCli = this.isExtensionDevelopmentHost && !!environmentService.extensionTestsPath && !environmentService.debugExtensionHost.break;
 
 		this.unsentMessages = [];
 		this.extensionHostProcessReady = false;
@@ -139,7 +139,7 @@ class ExtensionHostProcessManager {
 		this.initializeExtensionHostProcess = new TPromise<ChildProcess>((c, e) => {
 
 			// Resolve additional execution args (e.g. debug)
-			return this.resolveDebugPort(this.environmentService.debugExtensionHostPort, port => {
+			return this.resolveDebugPort(this.environmentService.debugExtensionHost.port, port => {
 				if (port) {
 					opts.execArgv = ['--nolazy', (this.isExtensionDevelopmentDebugging ? '--debug-brk=' : '--debug=') + port];
 				}