diff --git a/browser/components/places/content/bookmarksSidebar.xhtml b/browser/components/places/content/bookmarksSidebar.xhtml
index c203098f8bb1..b139f641d4aa 100644
--- a/browser/components/places/content/bookmarksSidebar.xhtml
+++ b/browser/components/places/content/bookmarksSidebar.xhtml
@@ -49,7 +49,7 @@
 #include placesContextMenu.inc.xhtml
 #include bookmarksHistoryTooltip.inc.xhtml
   <box id="sidebar-panel-header" align="center">
-    <h4 data-l10n-id="sidebar-menu-bookmarks-2"></h4>
+    <html:h4 data-l10n-id="sidebar-menu-bookmarks-2"></html:h4>
     <html:moz-button
         id="sidebar-panel-close"
         type="icon ghost"