diff --git a/files/en-us/web/javascript/reference/global_objects/map/map/index.html b/files/en-us/web/javascript/reference/global_objects/map/map/index.html
index 8cdbe85c5f64fb4..fd9e5668387a4ee 100644
--- a/files/en-us/web/javascript/reference/global_objects/map/map/index.html
+++ b/files/en-us/web/javascript/reference/global_objects/map/map/index.html
@@ -19,7 +19,7 @@ <h2 id="Syntax">Syntax</h2>
 <h3 id="Parameters">Parameters</h3>
 
 <dl>
-  <dt><code><var>iterable</var></code></dt>
+  <dt><code><var>iterable</var></code> {{optional_inline}}</dt>
   <dd>An {{jsxref("Array")}} or other <a
       href="/en-US/docs/Web/JavaScript/Guide/iterable">iterable</a> object whose elements
     are key-value pairs. (For example, arrays with two elements, such as