diff --git a/refs/ietf.json b/refs/ietf.json
index ac2c004da..77653f877 100644
--- a/refs/ietf.json
+++ b/refs/ietf.json
@@ -148962,6 +148962,7 @@
         ],
         "rawDate": "2024-12",
         "status": "Proposed Standard",
+        "hasErrata": "https://www.rfc-editor.org/errata/rfc9639",
         "publisher": "IETF",
         "source": "https://www.rfc-editor.org/in-notes/rfc-index.xml"
     },