---
title: "Deprecation: #108148 - Fluid LenientArgumentProcessor"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-108148-1766235915"
source: "Changelog/14.0/Deprecation-108148-FluidLenientArgumentProcessor.rst"
typo3-version: "14.0"
typo3-major: 14
type: "deprecation"
issue: 108148
forge: "https://forge.typo3.org/issues/108148"
tags: ["Fluid", "FullyScanned", "ext:fluid"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Deprecation: #108148 - Fluid LenientArgumentProcessor {#deprecation-108148-1766235915}

See [forge#108148](https://forge.typo3.org/issues/108148)

## Description {#description}

Fluid 5.0 deprecates `\TYPO3Fluid\Fluid\Core\ViewHelper\LenientArgumentProcessor`,
which will be removed with Fluid 6.0. `\TYPO3Fluid\Fluid\Core\ViewHelper\StrictArgumentProcessor`
is now used instead.

## Impact {#impact}

The impact of the switch to `\TYPO3Fluid\Fluid\Core\ViewHelper\StrictArgumentProcessor`
is documented in
[Breaking: #108148 - Strict Types in Fluid ViewHelpers](https://docs.typo3.org/permalink/changelog:breaking-108148-1763288349).

## Affected installations {#affected-installations}

Installations that use the `\TYPO3Fluid\Fluid\Core\ViewHelper\LenientArgumentProcessor`
programmatically.

## Migration {#migration}

The class can be copied to the project/extension if it's still required.