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-rw-r--r--components/script/dom/shadowroot.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/components/script/dom/shadowroot.rs b/components/script/dom/shadowroot.rs
index 1fa9faae287..24441391f94 100644
--- a/components/script/dom/shadowroot.rs
+++ b/components/script/dom/shadowroot.rs
@@ -42,6 +42,7 @@ pub struct ShadowRoot {
document: Dom<Document>,
host: MutNullableDom<Element>,
/// List of author styles associated with nodes in this shadow tree.
+ #[custom_trace]
author_styles: DomRefCell<AuthorStyles<StyleSheetInDocument>>,
stylesheet_list: MutNullableDom<StyleSheetList>,
window: Dom<Window>,