diff --git a/stack-0.html b/stack-0.html
index 187a386..7982741 100644
--- a/stack-0.html
+++ b/stack-0.html
@@ -61,7 +61,7 @@
     <body>
         <h1>Unstack</h1>
         <pre>df.unstack( level=0 )</pre>
-        <p>(The reverse operation is stack.)</p>
+        <p>(The reverse operation is a combination of stack and swaplevel.)</p>
         <hr/>
     </body>
 </html>
