// Show form if the user can submit
if ( $this->mIsAllowed ) {
$out->addModules( [ 'mediawiki.special.revisionDelete' ] );
- $out->addModuleStyles( 'mediawiki.special' );
+ $out->addModuleStyles( [ 'mediawiki.special',
+ 'mediawiki.interface.helpers.styles' ] );
$form = Xml::openElement( 'form', [ 'method' => 'post',
'action' => $this->getPageTitle()->getLocalURL( [ 'action' => 'submit' ] ),