diff --git a/api/HTMLFrameElement.json b/api/HTMLFrameElement.json
index fe5e563cf7ed8b..91fb2a8375c9c4 100644
--- a/api/HTMLFrameElement.json
+++ b/api/HTMLFrameElement.json
@@ -3,6 +3,7 @@
     "HTMLFrameElement": {
       "__compat": {
         "mdn_url": "https://developer.mozilla.org/docs/Web/API/HTMLFrameElement",
+        "spec_url": "https://html.spec.whatwg.org/multipage/obsolete.html#htmlframeelement",
         "support": {
           "chrome": {
             "version_added": "1"