diff --git a/packages/puppeteer-core/src/common/EventEmitter.ts b/packages/puppeteer-core/src/common/EventEmitter.ts
index 43168827f00..fbf259ec01b 100644
--- a/packages/puppeteer-core/src/common/EventEmitter.ts
+++ b/packages/puppeteer-core/src/common/EventEmitter.ts
@@ -18,7 +18,7 @@ import mitt, {
   type Emitter,
   type EventHandlerMap,
   type EventType,
-} from '../../third_party/mitt/index.js';
+} from '../../third_party/mitt/mitt.js';
 import {disposeSymbol} from '../util/disposable.js';
 
 export type {
@@ -26,7 +26,7 @@ export type {
    * @public
    */
   EventType,
-} from '../../third_party/mitt/index.js';
+} from '../../third_party/mitt/mitt.js';
 
 /**
  * @public
diff --git a/packages/puppeteer-core/third_party/mitt/index.ts b/packages/puppeteer-core/third_party/mitt/mitt.ts
similarity index 100%
rename from packages/puppeteer-core/third_party/mitt/index.ts
rename to packages/puppeteer-core/third_party/mitt/mitt.ts