diff --git a/extensions/SiteMapIndex/Extension.pm b/extensions/SiteMapIndex/Extension.pm
index 928bec160a..32804c1177 100644
--- a/extensions/SiteMapIndex/Extension.pm
+++ b/extensions/SiteMapIndex/Extension.pm
@@ -58,7 +58,7 @@ sub before_robots_txt {
     . Bugzilla->params->{sitemapindex_google_host}
     . '/storage/v1/b/'
     . Bugzilla->params->{sitemapindex_google_bucket} . '/o/'
-    . 'sitemap_index.xml';
+    . 'sitemap_index.xml?alt=media';
 
   $args->{vars}{SITEMAP_URL} = $sitemap_url;
 }
diff --git a/extensions/SiteMapIndex/lib/Util.pm b/extensions/SiteMapIndex/lib/Util.pm
index 06bc7ed2ae..c944d3d939 100644
--- a/extensions/SiteMapIndex/lib/Util.pm
+++ b/extensions/SiteMapIndex/lib/Util.pm
@@ -131,7 +131,7 @@ END
   foreach my $filename (@$filelist) {
     $index_xml .= "
   <sitemap>
-    <loc>$sitemap_url/$filename</loc>
+    <loc>$sitemap_url/$filename?alt=media</loc>
     <lastmod>$timestamp</lastmod>
   </sitemap>
 ";