diff --git a/index.html b/index.html
index 5db0327..3d44f5e 100644
--- a/index.html
+++ b/index.html
@@ -547,7 +547,7 @@ <h3>
       <section data-dfn-for="WakeLockRequestOptions"> <h3>The <dfn>WakeLockRequestOptions</dfn> dictionary</h3>
         <pre class="idl">
           dictionary WakeLockRequestOptions {
-            AbortSignal? signal = null;
+            AbortSignal? signal;
           };
         </pre>
         <p>