diff --git a/handbook/index.htm b/handbook/index.htm
index 447d40804..a2a542550 100644
--- a/handbook/index.htm
+++ b/handbook/index.htm
@@ -98,7 +98,7 @@ Things that are likely to be relevant at basecamp.
 </ul>
 <hr>
 
-<div id=menu>
+<div id="menu">
   <ul id="links">
     <li><a href="index.htm">Expedition Handbook</a>
       <ul>