diff --git a/api/MIDIInput.json b/api/MIDIInput.json
index 31a55ab3de7c81..a32bf4a6563214 100644
--- a/api/MIDIInput.json
+++ b/api/MIDIInput.json
@@ -122,68 +122,6 @@
             "deprecated": false
           }
         }
-      },
-      "onmidimessage": {
-        "__compat": {
-          "mdn_url": "https://developer.mozilla.org/docs/Web/API/MIDIInput/onmidimessage",
-          "spec_url": "https://webaudio.github.io/web-midi-api/#dom-midiinput-onmidimessage",
-          "support": {
-            "chrome": {
-              "version_added": "43"
-            },
-            "chrome_android": {
-              "version_added": "43"
-            },
-            "edge": {
-              "version_added": "79"
-            },
-            "firefox": [
-              {
-                "version_added": "99"
-              },
-              {
-                "version_added": "97",
-                "version_removed": "99",
-                "flags": [
-                  {
-                    "type": "preference",
-                    "name": "dom.webmidi.enabled",
-                    "value_to_set": "true"
-                  }
-                ]
-              }
-            ],
-            "firefox_android": {
-              "version_added": false
-            },
-            "ie": {
-              "version_added": false
-            },
-            "opera": {
-              "version_added": "30"
-            },
-            "opera_android": {
-              "version_added": "30"
-            },
-            "safari": {
-              "version_added": false
-            },
-            "safari_ios": {
-              "version_added": false
-            },
-            "samsunginternet_android": {
-              "version_added": "4.0"
-            },
-            "webview_android": {
-              "version_added": "43"
-            }
-          },
-          "status": {
-            "experimental": false,
-            "standard_track": true,
-            "deprecated": false
-          }
-        }
       }
     }
   }