diff --git a/tsguide.html b/tsguide.html
index d96372f03..3d1046fb0 100644
--- a/tsguide.html
+++ b/tsguide.html
@@ -1562,7 +1562,7 @@ <h4 id="functions-as-callbacks" class="numbered">Prefer passing arrow functions
 the named callback.</p>
 
 <pre><code class="language-ts good">// GOOD: Arguments are explicitly passed to the callback
-const numbers = ['11', '5', '3'].map((n) =&gt; parseInt(n));
+const numbers = ['11', '5', '3'].map((n) =&gt; parseInt(n, 10));
 // &gt; [11, 5, 3]
 
 // GOOD: Function is locally defined and is designed to be used as a callback