# Encountering a build error

**URL:** https://qa.fmod.com/t/encountering-a-build-error/24052
**Category:** Unity
**Tags:** unity
**Created:** [February 19, 2026, 4:30pm UTC](https://qa.fmod.com/t/encountering-a-build-error/24052 "2026-02-19T16:30:32Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![benjamin.emag](https://avatars.discourse-cdn.com/v4/letter/b/d6d6ee/32.png) [@benjamin.emag](https://qa.fmod.com/u/benjamin.emag)
#### Post date: [February 19, 2026, 4:30pm UTC](https://qa.fmod.com/t/encountering-a-build-error/24052/1 "2026-02-19T16:30:32Z")

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encountering a build error whenever I try to build my project to webGL anyone else experience this FMOD version: 2.03.12  
Unity version: 6000.3.5f1  
Build target: WebGPU  
Error: undefined symbol: FMOD5\_DSP\_AddInputPreallocated during wasm-ld linking

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<div class="post-metadata">

### Author: ![benjamin.emag](https://avatars.discourse-cdn.com/v4/letter/b/d6d6ee/32.png) [@benjamin.emag](https://qa.fmod.com/u/benjamin.emag)
#### Post date: [February 19, 2026, 6:19pm UTC](https://qa.fmod.com/t/encountering-a-build-error/24052/2 "2026-02-19T18:19:02Z")

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FIX:  
Seems like they left in an unused code that breaks the linker  
Commenting out in Fmod.cs

```auto
//\[DllImport(VERSION.dll)\]
//private static extern RESULT FMOD5_DSP_AddInputPreallocated (IntPtr dsp, IntPtr input, out IntPtr connection);

```

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<div class="post-metadata">

### Author: ![cameron-fmod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/cameron-fmod/32/261_2.png) [@cameron-fmod](https://qa.fmod.com/u/cameron-fmod)
#### Post date: [February 27, 2026, 6:07am UTC](https://qa.fmod.com/t/encountering-a-build-error/24052/3 "2026-02-27T06:07:46Z")

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It appears that this was fixed in 2.03.10, is it possible that some of your libs may be from an older version?