---
title: tcp_notify_ack_id_t
framework: Kernel
role: symbol
role_heading: Type Alias
platforms: [macOS 13.0+]
path: kernel/tcp_notify_ack_id_t
---

# tcp_notify_ack_id_t

## Declaration

```occ
typedef u_int32_t tcp_notify_ack_id_t;
```