--- a/browser/components/preferences/in-content-new/searchResults.xul
+++ b/browser/components/preferences/in-content-new/searchResults.xul
@@ -1,16 +1,16 @@
 <!-- This Source Code Form is subject to the terms of the Mozilla Public
    - License, v. 2.0. If a copy of the MPL was not distributed with this file,
    - You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <stringbundle id="searchResultBundle" src="chrome://browser/locale/preferences/preferences.properties"/>
 
 <hbox id="header-searchResults"
-      class="header"
+      class="subCategory"
       hidden="true"
       data-category="paneSearchResults">
   <label class="header-name" flex="1">&paneSearchResults.title;</label>
 </hbox>
 
 <groupbox class="no-results-message" align="start" data-category="paneSearchResults" hidden="true">
   <label id="sorry-message"></label>
   <label id="need-help"></label>