diff --git a/handbook/computing/keyexchange.html b/handbook/computing/keyexchange.html
index 2daed68c9..e520617a7 100644
--- a/handbook/computing/keyexchange.html
+++ b/handbook/computing/keyexchange.html
@@ -166,6 +166,10 @@ If you accepted the defaults, the public key will be called <var>~/.ssh/id_rsa.p
 <code>ssh-copy-id -i pulsifer_id_rsa.pub expo@expo.survex.com</code>
 <li>That's it.
 </ul>
+On a Windows machine, Microsoft have not implemented <var>ssh-copy-id</var> so you need to do this instead:
+<ul>
+<li><code>type .ssh\pulsifer_id_rsa.pub | ssh expo@expo.survex.com "cat >> .ssh/authorized_keys"</code>
+</ul>
 <h4>Using Filezilla and file copying</h4>
 <ul>
 <li>using sFTP (Filezilla configured to use sFTP, which uses Pageant by default) to