---
title: mbuf_get_minclsize
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1535737-mbuf_get_minclsize
---

# mbuf_get_minclsize

## Declaration

```occ
u_int32_t mbuf_get_minclsize(void);
```

## Return Value

Return Value The minimum number of bytes before a cluster will be used.

## Discussion

Discussion This routine returns the minimum number of data bytes before an external cluster is used. This is equivalent to the legacy MINCLSIZE macro.