diff --git a/lib/punycode.js b/lib/punycode.js
index 67905e3d7670e1..8b025927fa3ac1 100644
--- a/lib/punycode.js
+++ b/lib/punycode.js
@@ -46,7 +46,7 @@ function error(type) {
  * A generic `Array#map` utility function.
  * @private
  * @param {Array} array The array to iterate over.
- * @param {Function} callback The function that gets called for every array
+ * @param {Function} fn The function that gets called for every array
  * item.
  * @returns {Array} A new array of values returned by the callback function.
  */
@@ -63,8 +63,8 @@ function map(array, fn) {
  * A simple `Array#map`-like wrapper to work with domain name strings or email
  * addresses.
  * @private
- * @param {String} domain The domain name or email address.
- * @param {Function} callback The function that gets called for every
+ * @param {String} string The domain name or email address.
+ * @param {Function} fn The function that gets called for every
  * character.
  * @returns {Array} A new string of characters returned by the callback
  * function.
@@ -127,7 +127,7 @@ function ucs2decode(string) {
  * @see `punycode.ucs2.decode`
  * @memberOf punycode.ucs2
  * @name encode
- * @param {Array} codePoints The array of numeric code points.
+ * @param {Array} array The array of numeric code points.
  * @returns {String} The new Unicode string (UCS-2).
  */
 const ucs2encode = array => String.fromCodePoint(...array);