diff --git a/jsdoc.md b/jsdoc.md
index 6171f0cc3..1eee7ce82 100644
--- a/jsdoc.md
+++ b/jsdoc.md
@@ -13,6 +13,8 @@ weight: -1
  * This is a function.
  *
  * @param {string} n - A string param
+ * @param {string} [o] - A optional string param
+ * @param {string} [d=DefaultValue] - A optional string param
  * @return {string} A good string
  *
  * @example
@@ -20,7 +22,7 @@ weight: -1
  *     foo('hello')
  */
 
-function foo(n) {
+function foo(n, o, d) {
   return n
 }
 ```