diff --git a/css-layout-api/Overview.bs b/css-layout-api/Overview.bs
index eda70a1e..9b632f6e 100644
--- a/css-layout-api/Overview.bs
+++ b/css-layout-api/Overview.bs
@@ -825,7 +825,7 @@ interface ChildBreakToken {
 
 [Exposed=LayoutWorklet]
 interface BreakToken {
-    readonly attribute sequence<ChildBreakToken> childBreakTokens;
+    readonly attribute FrozenArray<ChildBreakToken> childBreakTokens;
     readonly attribute any data;
 };