diff --git a/open-in-web-browser.html b/open-in-web-browser.html
index 867fb9a..a701f6c 100644
--- a/open-in-web-browser.html
+++ b/open-in-web-browser.html
@@ -2736,7 +2736,7 @@ <h3>5.1 : Using Maps instead of Object Literals (ES2015)</h3>
                             <code>keys()</code>, <code>set()</code>, <code>values()</code>).</li>
                         <li>The <code>.set()</code> method returns the Map. Thus, <code>.set()</code> can be chained
                             (i.e.
-                            <code>myMap.set(key,value).add(key,value);</code>).</li>
+                            <code>myMap.set(key,value).set(key,value);</code>).</li>
                         <li>If you want to use Array methods on a Map simply spread the map into an array (i.e. <code>[...myMap].filter(...);</code>).</li>
                         <li>A narrow version of <code>Map()</code> is also available called <code>weakMap()</code>. A
                             <code>weakMap()</code>, mainly differs from a <code>Map()</code> in that it can only hold