diff --git a/packages/puppeteer-core/src/api/Frame.ts b/packages/puppeteer-core/src/api/Frame.ts
index ed6164552b3..19b5eb7fa0e 100644
--- a/packages/puppeteer-core/src/api/Frame.ts
+++ b/packages/puppeteer-core/src/api/Frame.ts
@@ -14,7 +14,6 @@ import type {
   WaitTimeoutOptions,
 } from '../api/Page.js';
 import type {DeviceRequestPrompt} from '../cdp/DeviceRequestPrompt.js';
-import type {IsolatedWorldChart} from '../cdp/IsolatedWorld.js';
 import type {PuppeteerLifeCycleEvent} from '../cdp/LifecycleWatcher.js';
 import {EventEmitter, type EventType} from '../common/EventEmitter.js';
 import {getQueryHandlerAndSelector} from '../common/GetQueryHandler.js';
@@ -38,8 +37,8 @@ import type {CDPSession} from './CDPSession.js';
 import type {KeyboardTypeOptions} from './Input.js';
 import {
   FunctionLocator,
-  type Locator,
   NodeLocator,
+  type Locator,
 } from './locators/locators.js';
 import type {Realm} from './Realm.js';
 
@@ -270,11 +269,6 @@ export abstract class Frame extends EventEmitter<FrameEvents> {
    */
   _parentId?: string;
 
-  /**
-   * @internal
-   */
-  worlds!: IsolatedWorldChart;
-
   /**
    * @internal
    */
diff --git a/packages/puppeteer-core/src/cdp/Frame.ts b/packages/puppeteer-core/src/cdp/Frame.ts
index 844120d7ffa..edc7009b11d 100644
--- a/packages/puppeteer-core/src/cdp/Frame.ts
+++ b/packages/puppeteer-core/src/cdp/Frame.ts
@@ -20,6 +20,7 @@ import type {
   DeviceRequestPromptManager,
 } from './DeviceRequestPrompt.js';
 import type {FrameManager} from './FrameManager.js';
+import type {IsolatedWorldChart} from './IsolatedWorld.js';
 import {IsolatedWorld} from './IsolatedWorld.js';
 import {MAIN_WORLD, PUPPETEER_WORLD} from './IsolatedWorlds.js';
 import {
@@ -35,6 +36,7 @@ export class CdpFrame extends Frame {
   #url = '';
   #detached = false;
   #client!: CDPSession;
+  worlds!: IsolatedWorldChart;
 
   _frameManager: FrameManager;
   override _id: string;