diff --git a/index.js b/index.js
index 2e44517..a078cb8 100644
--- a/index.js
+++ b/index.js
@@ -48,7 +48,9 @@ const dutchSch = /E[DMNR]|UY|OO/
  * Get the phonetics according to the Double Metaphone algorithm from a value.
  *
  * @param {string} value
+ *   Value to use.
  * @returns {[string, string]}
+ *   Double metaphone codes for `value`.
  */
 // eslint-disable-next-line complexity
 export function doubleMetaphone(value) {