diff --git a/api/TextTrackList.json b/api/TextTrackList.json
index 4d36e08a1cca67..25029026e085c4 100644
--- a/api/TextTrackList.json
+++ b/api/TextTrackList.json
@@ -48,11 +48,11 @@
           "deprecated": false
         }
       },
-      "addTrack_event": {
+      "addtrack_event": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/TextTrackList/addTrack_event",
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/TextTrackList/addtrack_event",
           "spec_url": "https://html.spec.whatwg.org/multipage/media.html#event-media-addtrack",
-          "description": "<code>addTrack</code> event",
+          "description": "<code>addtrack</code> event",
           "support": {
             "chrome": {
               "version_added": true
@@ -405,11 +405,11 @@
           }
         }
       },
-      "removeTrack_event": {
+      "removetrack_event": {
         "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/TextTrackList/removeTrack_event",
+          "mdn_url": "https://developer.mozilla.org/docs/Web/API/TextTrackList/removetrack_event",
           "spec_url": "https://html.spec.whatwg.org/multipage/media.html#event-media-removetrack",
-          "description": "<code>removeTrack</code> event",
+          "description": "<code>removetrack</code> event",
           "support": {
             "chrome": {
               "version_added": true