2 files changed, 18 insertions, 10 deletions
diff --git a/cli/js/lib.deno.ns.d.ts b/cli/js/lib.deno.ns.d.ts
index cd82b4adf..82b3fc829 100644
--- a/cli/js/lib.deno.ns.d.ts
+++ b/cli/js/lib.deno.ns.d.ts
@@ -1080,10 +1080,14 @@ declare namespace Deno {
    * Throws Error (not implemented) if executed on Windows
    *
    * @param path path to the file
-   * @param uid user id (UID) of the new owner
-   * @param gid group id (GID) of the new owner
+   * @param uid user id (UID) of the new owner, or `null` for no change
+   * @param gid group id (GID) of the new owner, or `null` for no change
    */
-  export function chownSync(path: string | URL, uid: number, gid: number): void;
+  export function chownSync(
+    path: string | URL,
+    uid: number | null,
+    gid: number | null
+  ): void;
 
   /** Change owner of a regular file or directory. This functionality
    * is not available on Windows.
@@ -1097,13 +1101,13 @@ declare namespace Deno {
    * Throws Error (not implemented) if executed on Windows
    *
    * @param path path to the file
-   * @param uid user id (UID) of the new owner
-   * @param gid group id (GID) of the new owner
+   * @param uid user id (UID) of the new owner, or `null` for no change
+   * @param gid group id (GID) of the new owner, or `null` for no change
    */
   export function chown(
     path: string | URL,
-    uid: number,
-    gid: number
+    uid: number | null,
+    gid: number | null
   ): Promise<void>;
 
   export interface RemoveOptions {
diff --git a/cli/js/ops/fs/chown.ts b/cli/js/ops/fs/chown.ts
index f24ab5e55..3afe07f16 100644
--- a/cli/js/ops/fs/chown.ts
+++ b/cli/js/ops/fs/chown.ts
@@ -2,15 +2,19 @@
 import { sendSync, sendAsync } from "../dispatch_json.ts";
 import { pathFromURL } from "../../util.ts";
 
-export function chownSync(path: string | URL, uid: number, gid: number): void {
+export function chownSync(
+  path: string | URL,
+  uid: number | null,
+  gid: number | null
+): void {
   path = pathFromURL(path);
   sendSync("op_chown", { path, uid, gid });
 }
 
 export async function chown(
   path: string | URL,
-  uid: number,
-  gid: number
+  uid: number | null,
+  gid: number | null
 ): Promise<void> {
   path = pathFromURL(path);
   await sendAsync("op_chown", { path, uid, gid });