Editing Manual/Upgrading (section)

=== Skin registration === <!--T:153-->
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Since MediaWiki 1.24, bundled skins like Vector, Monobook, Modern and CologneBlue are no longer part of MediaWiki core, and they need to be registered explicitly in <tvar name=localsettings><code>LocalSettings.php</code></tvar> to use them, otherwise MediaWiki will warn that you don't have installed skins.

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This is what you need to add to <tvar name=localsettings><code>LocalSettings.php</code></tvar> when upgrading from versions older than 1.24 and want to have available one of those skins:
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<syntaxhighlight lang="php">
wfLoadSkin( 'Vector' );
wfLoadSkin( 'MonoBook' );
wfLoadSkin( 'Modern' );
wfLoadSkin( 'CologneBlue' );
</syntaxhighlight>

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Other skins may still not be adapted to the new [[<tvar name=skinreg>Special:MyLanguage/Manual:Extension registration</tvar>|skin registration]] system, so refer to the documentation page about each skin to see how to register it properly in case of problems.