# FLIRT threshold

**URL:** <https://community.hex-rays.com/t/flirt-threshold/637>\
**Category:** IDA General\
**Created:** [January 7, 2026, 1:37pm UTC](https://community.hex-rays.com/t/flirt-threshold/637 "2026-01-07T13:37:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![revs](https://avatars.discourse-cdn.com/v4/letter/r/dc4da7/32.png) [@revs](https://community.hex-rays.com/u/revs)\
**Post date:** [January 7, 2026, 1:37pm UTC](https://community.hex-rays.com/t/flirt-threshold/637/1 "2026-01-07T13:37:05Z")

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Remind me how to change the FLIRT threshold for minor functions so it ignores minor functions.

You once informed me via email, but I’ve lost it.

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**Author:** ![igor](https://sea2.discourse-cdn.com/flex002/user_avatar/community.hex-rays.com/igor/32/35_2.png) [@igor](https://community.hex-rays.com/u/igor)\
**Post date:** [January 8, 2026, 11:00am UTC](https://community.hex-rays.com/t/flirt-threshold/637/2 "2026-01-08T11:00:18Z")

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maybe this (from `pelf -h`)?  
`-M## minimal number of defined bytes in a pattern (default: 4)`

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<div class="post-metadata">

**Author:** ![revs](https://avatars.discourse-cdn.com/v4/letter/r/dc4da7/32.png) [@revs](https://community.hex-rays.com/u/revs)\
**Post date:** [January 8, 2026, 12:12pm UTC](https://community.hex-rays.com/t/flirt-threshold/637/3 "2026-01-08T12:12:44Z")

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not about create signature

about using flirt in IDA

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<div class="post-metadata">

**Author:** ![igor](https://sea2.discourse-cdn.com/flex002/user_avatar/community.hex-rays.com/igor/32/35_2.png) [@igor](https://community.hex-rays.com/u/igor)\
**Post date:** [January 12, 2026, 11:37am UTC](https://community.hex-rays.com/t/flirt-threshold/637/4 "2026-01-12T11:37:23Z")

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I don’t think there is such a setting in IDA itself, AFAIK it tries to apply all signatures present in the .sig file.

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<div class="post-metadata">

**Author:** ![revs](https://avatars.discourse-cdn.com/v4/letter/r/dc4da7/32.png) [@revs](https://community.hex-rays.com/u/revs)\
**Post date:** [January 12, 2026, 5:42pm UTC](https://community.hex-rays.com/t/flirt-threshold/637/5 "2026-01-12T17:42:00Z")

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If such an option doesn’t exist, I’d like it to appear.  
So that when loading a file, you can specify the minimum size of functions to which signatures can be applied.  
Because repackaging standard signatures is very expensive.

Furthermore, I still hope that FILRT will acquire some semblance of a Lumina interface.  
So that automatic signature application can be disabled.  
And, following the example of the Lumina interface, you can choose which functions to apply found signatures to and which to ignore.