diff --git a/docs.html b/docs.html
index 3b46b12..d0f3210 100644
--- a/docs.html
+++ b/docs.html
@@ -236,7 +236,7 @@ gm("img.png").append("another.jpg", "third.gif", true)
             <pre><code>gm("img.png").deconstruct()</code></pre>
           </li>
           <li id="define"><a href="http://www.graphicsmagick.org/GraphicsMagick.html#details-define">define</a>
-            <pre><code>gm("img.png").define()</code></pre>
+            <pre><code>gm("img.png").define(value)</code></pre>
           </li>
           <li id="delay"><a href="http://www.graphicsmagick.org/GraphicsMagick.html#details-delay">delay</a>
             <p>`amount` is in hundreths of a second.</p>