---
title: "Deprecation: #64134 - Deprecate $BE_USER->OS"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-64134"
source: "Changelog/7.2/Deprecation-65343-BackendUserOsProperty.rst"
typo3-version: "7.2"
typo3-major: 7
type: "deprecation"
issue: 64134
forge: "https://forge.typo3.org/issues/64134"
tags: ["PHP-API", "Backend"]
rendered: "2026-09-25T23:17:45+00:00"
---

# Deprecation: #64134 - Deprecate $BE_USER->OS {#deprecation-64134}

See [forge#64134](https://forge.typo3.org/issues/64134)

## Description {#description}

The public property in the global object `$BE_USER->OS` has been marked as deprecated.

## Affected installations {#affected-installations}

Instances with extensions that make use of the public property directly.

## Migration {#migration}

Use the constant `TYPO3_OS` directly.