diff --git a/api/HTMLAnchorElement.json b/api/HTMLAnchorElement.json
index 6e508e55574eb7..b6deeb819dfa4a 100644
--- a/api/HTMLAnchorElement.json
+++ b/api/HTMLAnchorElement.json
@@ -573,6 +573,7 @@
       },
       "ping": {
         "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/HTMLAnchorElement/ping",
           "spec_url": "https://html.spec.whatwg.org/multipage/text-level-semantics.html#dom-a-ping",
           "support": {
             "chrome": {
diff --git a/api/HTMLAreaElement.json b/api/HTMLAreaElement.json
index 93c6162be9ef71..b2cd26536d0833 100644
--- a/api/HTMLAreaElement.json
+++ b/api/HTMLAreaElement.json
@@ -457,6 +457,7 @@
       },
       "ping": {
         "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/HTMLAreaElement/ping",
           "spec_url": "https://html.spec.whatwg.org/multipage/image-maps.html#dom-area-ping",
           "support": {
             "chrome": {