# TOUCH_INVALID_FACE

*LSL constant*

```lsl
integer TOUCH_INVALID_FACE = -1;
```

Returned by [llDetectedTouchFace](/functions/llDetectedTouchFace/) when the [touch position](https://wiki.secondlife.com/wiki/LSL_Touch_Position) is not valid.

Specifically when...

- The avatar's viewer does not support face touch detection.
- The touch has moved off the surface of the prim.
- The triggering event is not a touch event.

## History

- Introduced in SVN:1167 r96080 Branch:viewer_1-21-2 Tuesday, 09 September 2008
- Merged into Trunk SVN:1169 r96492 Thursday, 11 September 2008

## See also

### Functions

- [llDetectedTouchFace](/functions/llDetectedTouchFace/)

---

*Source: [TOUCH INVALID FACE](https://wiki.secondlife.com/wiki/TOUCH_INVALID_FACE) on the Second Life Wiki. Content from the Second Life Wiki article TOUCH INVALID FACE (revision 91090, 2008-09-13), CC BY-SA 3.0.*

---

From lsl.dev: https://lsl.dev/constants/TOUCH_INVALID_FACE/