---
title: "Deprecation: #88995 - Calling registerPlugin with vendor name"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-88995"
source: "Changelog/10.1/Deprecation-88995-CallingRegisterPluginWithVendorName.rst"
modified: "2026-09-14T09:47:36+00:00"
---

# Deprecation: #88995 - Calling registerPlugin with vendor name

See [forge#88995](https://forge.typo3.org/issues/88995)

## Description

The first parameter `$extensionName` of method `\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin`
used to contain the vendor name in the past.

```php
\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin(
    'TYPO3.CMS.Form',
    'Formframework',
    'Form',
    'content-form',
);
```

As the vendor name does not have any effect at all, it's usage has been marked as deprecated.

## Impact

Calling `registerPlugin()` with first parameter containing dots (considered to be the full vendor) name will trigger a PHP `E_USER_DEPRECATED` error.
As of TYPO3 v11 using the vendor name along with the extension name will lead to a wrong registration of plugins.

## Affected Installations

All installations that add the vendor name to the first parameter `$extensionName`
of method `\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin()` are affected.

## Migration

Just use the extension name like in this example.

```php
\TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin(
    'Form',
    'Formframework',
    'Form',
    'content-form',
);
```