# Linter: \[msg\] 'Buffer' is not defined
**URL:** https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810
**Category:** General
**Created:** [21 September 2026 12:18 UTC](https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810 "2026-09-21T12:18:59Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@protonmw](https://discourse.nodered.org/u/protonmw)
#### Post date: [21 September 2026 12:18 UTC](https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810/1 "2026-09-21T12:18:59Z")
Hi experts!
I'm using `Buffer.from(xyz);` in a function node and it works exactly as intended, but linter gives an error:
> [msg] 'Buffer' is not defined.
How can I prevent this?
(Or: how to put ascii character 182 into a string and send it correct via tcp?)
---
### Author:  [@bakman2](https://discourse.nodered.org/u/bakman2)
#### Post date: [21 September 2026 15:36 UTC](https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810/2 "2026-09-21T15:36:24Z")
How are you using the buffer ?
```auto
const bla = "hello"
const test = Buffer.from(bla)
msg.payload = test
return msg;
```
no linting error (?)
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [21 September 2026 15:51 UTC](https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810/3 "2026-09-21T15:51:47Z")
That does give the error, assuming that you have nrlint installed.
I think it is because Buffer is a nodejs thing, not basic javascript, though I think there is an option you can select somewhere to tell it to pick up the nodjs types.
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [21 September 2026 15:55 UTC](https://discourse.nodered.org/t/linter-msg-buffer-is-not-defined/101810/4 "2026-09-21T15:55:29Z")
@protonmw the workaround is to open the linter panel, click the dropdown arrow against the error and select to disable that warning.