diff --git a/docs/_includes/css/buttons.html b/docs/_includes/css/buttons.html
index bfc5ded80..ee03c1d65 100644
--- a/docs/_includes/css/buttons.html
+++ b/docs/_includes/css/buttons.html
@@ -114,7 +114,7 @@
 
 
   <h2 id="buttons-disabled">Disabled state</h2>
-  <p>Make buttons look unclickable by fading them back 50%.</p>
+  <p>Make buttons look unclickable by fading them back with <code>opacity</code>.</p>
 
   <h3>Button element</h3>
   <p>Add the <code>disabled</code> attribute to <code>&lt;button&gt;</code> buttons.</p>