diff --git a/html/global_attributes.json b/html/global_attributes.json
index 7e435faad63774..e1d7e089e77ee3 100644
--- a/html/global_attributes.json
+++ b/html/global_attributes.json
@@ -698,7 +698,8 @@
               },
               "opera_android": "mirror",
               "safari": {
-                "version_added": false
+                "version_added": false,
+                "impl_url": "https://webkit.org/b/238266"
               },
               "safari_ios": "mirror",
               "samsunginternet_android": "mirror",