diff --git a/doc/api/fs.md b/doc/api/fs.md
index 5d0dd605b328be..9a12289739f64f 100644
--- a/doc/api/fs.md
+++ b/doc/api/fs.md
@@ -2399,6 +2399,7 @@ changes:
   * `verbatimSymlinks` {boolean} When `true`, path resolution for symlinks will
     be skipped. **Default:** `false`
 * `callback` {Function}
+  * `err` {Error}
 
 Asynchronously copies the entire directory structure from `src` to `dest`,
 including subdirectories and files.
diff --git a/lib/fs.js b/lib/fs.js
index fd9e1e316bc416..bfb81ce8177b1d 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -3045,7 +3045,7 @@ function copyFileSync(src, dest, mode) {
  * @param {string | URL} src
  * @param {string | URL} dest
  * @param {object} [options]
- * @param {() => any} callback
+ * @param {(err?: Error) => any} callback
  * @returns {void}
  */
 function cp(src, dest, options, callback) {