diff --git a/src/vs/code/electron-main/window.ts b/src/vs/code/electron-main/window.ts
index 6857a6ec003e981c3b5fb98f93299fdcb24e7129..94f922f6cec953a4efa8e09fb9be33584c976e63 100644
--- a/src/vs/code/electron-main/window.ts
+++ b/src/vs/code/electron-main/window.ts
@@ -32,7 +32,6 @@ export interface IWindowCreationOptions {
 	extensionDevelopmentPath?: string;
 	allowFullscreen?: boolean;
 	titleBarStyle?: 'native' | 'custom';
-	vscodeWindowId?: string;
 }
 
 export enum WindowMode {
@@ -139,7 +138,6 @@ export class VSCodeWindow implements IVSCodeWindow {
 	private _lastFocusTime: number;
 	private _readyState: ReadyState;
 	private _extensionDevelopmentPath: string;
-	private _vscodeWindowId: string;
 	private windowState: IWindowState;
 	private currentWindowMode: WindowMode;
 
@@ -199,8 +197,6 @@ export class VSCodeWindow implements IVSCodeWindow {
 			}
 		}
 
-		this._vscodeWindowId = config.vscodeWindowId ? config.vscodeWindowId : Date.now().toString();
-
 		// Create the browser window.
 		this._win = new BrowserWindow(options);
 		this._id = this._win.id;
@@ -265,10 +261,6 @@ export class VSCodeWindow implements IVSCodeWindow {
 		return this._win;
 	}
 
-	public get vscodeWindowId(): string {
-		return this._vscodeWindowId;
-	}
-
 	public focus(): void {
 		if (!this._win) {
 			return;