diff --git a/inputfiles/knownTypes.json b/inputfiles/knownTypes.json
index 02832fd14..ba052fbbf 100644
--- a/inputfiles/knownTypes.json
+++ b/inputfiles/knownTypes.json
@@ -32,7 +32,6 @@
         "HmacKeyGenParams",
         "ImageBitmapRenderingContextSettings",
         "Keyframe",
-        "MutationRecordType",
         "NamedCurve",
         "OptionalPrefixToken",
         "OptionalPostfixToken",
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index e6a08dc8d..a1b14d278 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -1467,16 +1467,6 @@
                     ]
                 }
             },
-            "HTMLTableRowElement": {
-                "properties": {
-                    "property": {
-                        "cells": {
-                            "name": "cells",
-                            "overrideType": "HTMLCollectionOf<HTMLTableCellElement>"
-                        }
-                    }
-                }
-            },
             "XMLHttpRequestEventTarget": {
                 "properties": {
                     "property": {
@@ -1563,16 +1553,6 @@
                     }
                 }
             },
-            "MutationRecord": {
-                "properties": {
-                    "property": {
-                        "type": {
-                            "name": "type",
-                            "overrideType": "MutationRecordType"
-                        }
-                    }
-                }
-            },
             "URL": {
                 "constructor": {
                     "signature": {
diff --git a/inputfiles/patches/dom.kdl b/inputfiles/patches/dom.kdl
index ba2634290..2e4aac3df 100644
--- a/inputfiles/patches/dom.kdl
+++ b/inputfiles/patches/dom.kdl
@@ -26,6 +26,10 @@ interface Document {
   }
 }
 
+interface MutationRecord {
+  property type type=MutationRecordType
+}
+
 enum InsertPosition {
   beforebegin
   beforeend
diff --git a/inputfiles/patches/html.kdl b/inputfiles/patches/html.kdl
index dd2e5676d..20b0fe173 100644
--- a/inputfiles/patches/html.kdl
+++ b/inputfiles/patches/html.kdl
@@ -36,6 +36,14 @@ interface HTMLTableSectionElement {
   }
 }
 
+interface HTMLTableRowElement {
+  property cells {
+    type HTMLCollectionOf {
+      type HTMLTableCellElement
+    }
+  }
+}
+
 interface HTMLMeterElement {
   property labels {
     type NodeListOf {