# Unknown setting 'capitalize' for mutate Error

**URL:** https://discuss.elastic.co/t/unknown-setting-capitalize-for-mutate-error/127616
**Category:** Logstash
**Created:** [April 11, 2018, 11:22am UTC](https://discuss.elastic.co/t/unknown-setting-capitalize-for-mutate-error/127616 "2018-04-11T11:22:48Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![FreeYourMinds](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@FreeYourMinds](https://discuss.elastic.co/u/FreeYourMinds)
#### Post date: [April 11, 2018, 11:22am UTC](https://discuss.elastic.co/t/unknown-setting-capitalize-for-mutate-error/127616/1 "2018-04-11T11:22:49Z")

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Hi,

running Logstash 6.2.2 and trying to use the capitalize mutation

```auto
if [LogLevel] {
  mutate {
     capitalize => ["LogLevel"]
  }
}

```

Logstash fails to load its configuration reporting in the Log  
`[ERROR][logstash.filters.mutate] Unknown setting 'capitalize' for mutate`

This only applies to `capitalize` using lowercase or uppercase works just fine.  
Am I missing something here or is this a bug in the mutation plugin?

Kind regards,  
Holger

---

<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 9, 2018, 11:37am UTC](https://discuss.elastic.co/t/unknown-setting-capitalize-for-mutate-error/127616/2 "2018-05-09T11:37:33Z")

</div>

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