---
title: kUSBInterfaceSubClass
framework: IOKit
role: symbol
role_heading: Macro
platforms: [Mac Catalyst 13.0+, macOS 10.0+]
path: iokit/kusbinterfacesubclass
---

# kUSBInterfaceSubClass

## Declaration

```occ
#define kUSBInterfaceSubClass
```

## Discussion

The field in the USB Interface Descriptor corresponding to the interface sub class