diff --git a/modules/audit/pages/audit/system-audit/index(default).phtml b/modules/audit/pages/audit/system-audit/index(default).phtml
index 1d7d4b2..f25ba73 100644
--- a/modules/audit/pages/audit/system-audit/index(default).phtml
+++ b/modules/audit/pages/audit/system-audit/index(default).phtml
@@ -46,7 +46,11 @@ $pageConfig = [
   'filterSchema' => $clientFilterSchema,
   'filterChipMeta' => $filterChipMeta,
   'gridLang' => $gridLang,
-  'exportUrl' => lurl('admin/system-audit/export'),
+  // Uses the page target path, not the registered route path: the Router's
+  // applyRoutes() rewrite does not strip query strings before matching, so
+  // "admin/system-audit/export?format=csv" would miss the rewrite and 404.
+  // Matches the convention already used for `dataUrl: 'audit/system-audit/data'`.
+  'exportUrl' => lurl('audit/system-audit/export'),
   'labels' => [
     'created' => t('Created'),
     'status' => t('Status'),