diff --git a/idlecycles/chapter3.html b/idlecycles/chapter3.html
index a189403..525dbdf 100644
--- a/idlecycles/chapter3.html
+++ b/idlecycles/chapter3.html
@@ -190,9 +190,8 @@ <h3>Pattern as a class</h3>
       Pattern.prototype.fast = function (factor) {
         return fast(factor, this);
       };
-
       Pattern.prototype.slow = function (factor) {
-        return slow(factor, this);
+        return fast(1 / factor, this);
       };
       codeblock(document.currentScript, 6);
     </script>