---
title: MBUF_WAITOK
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1644523-anonymous/mbuf_waitok
---

# MBUF_WAITOK

## Declaration

```occ
MBUF_WAITOK = 0
```

## Discussion

Discussion Allow a call to allocate an mbuf to block.