diff --git a/fetch.bs b/fetch.bs
index 007ca829f..122efc771 100755
--- a/fetch.bs
+++ b/fetch.bs
@@ -9269,7 +9269,7 @@ interface FetchLaterResult {
 };
 
 partial interface Window {
-  [NewObject] FetchLaterResult fetchLater(RequestInfo input, optional DeferredRequestInit init = {});
+  [NewObject, SecureContext] FetchLaterResult fetchLater(RequestInfo input, optional DeferredRequestInit init = {});
 };
 </pre>