diff --git a/resources/js/ext.uls.interface.js b/resources/js/ext.uls.interface.js
index 39761e19..ed854a83 100644
--- a/resources/js/ext.uls.interface.js
+++ b/resources/js/ext.uls.interface.js
@@ -141,6 +141,7 @@
 		} );
 		$ulsSettingsBlock.append( $languageSettingsMenuButton );
 
+		uls.$menu.addClass( 'notheme' ); // T365990
 		return $ulsSettingsBlock;
 	}