diff --git a/inputfiles/addedTypes.jsonc b/inputfiles/addedTypes.jsonc
index 12d32ca4e..2bc595430 100644
--- a/inputfiles/addedTypes.jsonc
+++ b/inputfiles/addedTypes.jsonc
@@ -830,18 +830,6 @@
     },
     "dictionaries": {
         "dictionary": {
-            "KeyboardEventInit": {
-                "members": {
-                    "member": {
-                        "charCode": {
-                            "deprecated": true
-                        },
-                        "keyCode": {
-                            "deprecated": true
-                        }
-                    }
-                }
-            },
             "ReadableStreamReadDoneResult": {
                 "name": "ReadableStreamReadDoneResult",
                 "typeParameters": [
diff --git a/inputfiles/patches/uievents.kdl b/inputfiles/patches/uievents.kdl
new file mode 100644
index 000000000..ba481a127
--- /dev/null
+++ b/inputfiles/patches/uievents.kdl
@@ -0,0 +1,4 @@
+dictionary KeyboardEventInit {
+  member charCode deprecated=#true
+  member keyCode deprecated=#true
+}
diff --git a/src/build/patches.ts b/src/build/patches.ts
index 77c455515..f37554971 100644
--- a/src/build/patches.ts
+++ b/src/build/patches.ts
@@ -316,6 +316,7 @@ function handleMember(c: Node): Partial<Member> {
     name,
     ...optionalMember("type", "string", c.properties?.type),
     ...optionalMember("required", "boolean", c.properties?.required),
+    ...optionalMember("deprecated", "boolean", c.properties?.deprecated),
     ...optionalMember("overrideType", "string", c.properties?.overrideType),
   };
 }