diff --git a/engine/public/sky/sky_view.cc b/engine/public/sky/sky_view.cc
index e9a6bdbd0d4..09ec21c8788 100644
--- a/engine/public/sky/sky_view.cc
+++ b/engine/public/sky/sky_view.cc
@@ -14,7 +14,8 @@
 
 namespace blink {
 
-struct SkyView::Data {
+class SkyView::Data {
+ public:
   RefPtr<View> view_;
 };