diff --git a/src/app/config-handler.ts b/src/app/config-handler.ts
index 5c933372..17605793 100644
--- a/src/app/config-handler.ts
+++ b/src/app/config-handler.ts
@@ -39,7 +39,7 @@ export interface IConfig {
     permissions: IPermission;
     customFlags: ICustomFlag;
     crashReporter: ICrashReporter;
-    mainWinPos: ICustomRectangle;
+    mainWinPos?: ICustomRectangle;
 }
 
 export interface IPermission {
@@ -69,7 +69,7 @@ export interface INotificationSetting {
     display: string;
 }
 
-export interface ICustomRectangle extends Electron.Rectangle {
+export interface ICustomRectangle extends Partial<Electron.Rectangle> {
     isMaximized: boolean;
     isFullScreen: boolean;
 }
diff --git a/src/app/window-handler.ts b/src/app/window-handler.ts
index 84beda2b..5617cb2e 100644
--- a/src/app/window-handler.ts
+++ b/src/app/window-handler.ts
@@ -232,7 +232,7 @@ export class WindowHandler {
             ...this.windowOpts, ...getBounds(this.config.mainWinPos, DEFAULT_WIDTH, DEFAULT_HEIGHT),
         }) as ICustomBrowserWindow;
         this.mainWindow.winName = apiName.mainWindowName;
-        const { isFullScreen, isMaximized } = this.config.mainWinPos;
+        const { isFullScreen, isMaximized } = this.config.mainWinPos ? this.config.mainWinPos : { isFullScreen: false, isMaximized: false };
         if (isMaximized) {
             this.mainWindow.maximize();
         }
diff --git a/src/app/window-utils.ts b/src/app/window-utils.ts
index 2d8d2504..1def86a2 100644
--- a/src/app/window-utils.ts
+++ b/src/app/window-utils.ts
@@ -11,7 +11,7 @@ import { i18n, LocaleType } from '../common/i18n';
 import { logger } from '../common/logger';
 import { getGuid } from '../common/utils';
 import { whitelistHandler } from '../common/whitelist-handler';
-import { config } from './config-handler';
+import { config, ICustomRectangle } from './config-handler';
 import { screenSnippet } from './screen-snippet-handler';
 import { ICustomBrowserWindow, windowHandler } from './window-handler';
 
@@ -286,8 +286,8 @@ export const sanitize = async (windowName: string): Promise<void> => {
  * @param defaultHeight
  * @return {x?: Number, y?: Number, width: Number, height: Number}
  */
-export const getBounds = (winPos: Electron.Rectangle, defaultWidth: number, defaultHeight: number): Partial<Electron.Rectangle> => {
-    if (!winPos) {
+export const getBounds = (winPos: ICustomRectangle | Electron.Rectangle | undefined, defaultWidth: number, defaultHeight: number): Partial<Electron.Rectangle> => {
+    if (!winPos || !winPos.x || !winPos.y || !winPos.width || !winPos.height) {
         return { width: defaultWidth, height: defaultHeight };
     }
     const displays = electron.screen.getAllDisplays();