diff --git a/integration/websockets/e2e/gateway-ack.spec.ts b/integration/websockets/e2e/gateway-ack.spec.ts
index 034a7ae29..6ae5658b5 100644
--- a/integration/websockets/e2e/gateway-ack.spec.ts
+++ b/integration/websockets/e2e/gateway-ack.spec.ts
@@ -41,5 +41,38 @@ describe('WebSocketGateway (ack)', () => {
     );
   });
 
+  it('should handle manual ack for async operations when @Ack() is used (success case)', async () => {
+    app = await createNestApp(AckGateway);
+    await app.listen(3000);
+
+    ws = io('http://localhost:8080');
+    const payload = { shouldSucceed: true };
+
+    await new Promise<void>(resolve =>
+      ws.emit('manual-ack', payload, response => {
+        expect(response).to.eql({ status: 'success', data: payload });
+        resolve();
+      }),
+    );
+  });
+
+  it('should handle manual ack for async operations when @Ack() is used (error case)', async () => {
+    app = await createNestApp(AckGateway);
+    await app.listen(3000);
+
+    ws = io('http://localhost:8080');
+    const payload = { shouldSucceed: false };
+
+    await new Promise<void>(resolve =>
+      ws.emit('manual-ack', payload, response => {
+        expect(response).to.eql({
+          status: 'error',
+          message: 'Operation failed',
+        });
+        resolve();
+      }),
+    );
+  });
+
   afterEach(() => app.close());
 });
diff --git a/integration/websockets/src/ack.gateway.ts b/integration/websockets/src/ack.gateway.ts
index d1855058d..54942d74d 100644
--- a/integration/websockets/src/ack.gateway.ts
+++ b/integration/websockets/src/ack.gateway.ts
@@ -1,4 +1,9 @@
-import { SubscribeMessage, WebSocketGateway } from '@nestjs/websockets';
+import {
+  Ack,
+  MessageBody,
+  SubscribeMessage,
+  WebSocketGateway,
+} from '@nestjs/websockets';
 
 @WebSocketGateway(8080)
 export class AckGateway {
@@ -6,4 +11,19 @@ export class AckGateway {
   onPush() {
     return 'pong';
   }
+
+  @SubscribeMessage('manual-ack')
+  async handleManualAck(
+    @MessageBody() data: any,
+    @Ack() ack: (response: any) => void,
+  ) {
+    await new Promise(resolve => setTimeout(resolve, 20));
+
+    if (data.shouldSucceed) {
+      ack({ status: 'success', data });
+    } else {
+      ack({ status: 'error', message: 'Operation failed' });
+    }
+    return { status: 'ignored' };
+  }
 }