--- third_party/blink/renderer/core/dom/tree_scope.h.orig	2025-10-28 14:29:43 UTC
+++ third_party/blink/renderer/core/dom/tree_scope.h
@@ -29,6 +29,7 @@
 
 #include "third_party/blink/renderer/bindings/core/v8/v8_observable_array_css_style_sheet.h"
 #include "third_party/blink/renderer/core/core_export.h"
+#include "third_party/blink/renderer/core/css/css_style_sheet.h"
 #include "third_party/blink/renderer/core/dom/tree_ordered_map.h"
 #include "third_party/blink/renderer/core/html/forms/radio_button_group_scope.h"
 #include "third_party/blink/renderer/core/layout/hit_test_request.h"
