diff --git a/handbook/known.htm b/handbook/known.htm
index 79a16dd80..aa3609f31 100644
--- a/handbook/known.htm
+++ b/handbook/known.htm
@@ -120,7 +120,7 @@ alloy tag added in 1998, GPS fix</td></tr>
 </td><td>No. in red (1977) very faded (1998)<br />
 alloy tag added in 1998, GPS fix, surface survey</td></tr>
 
-<tr><td></td><td><a href="../plateau/104.htm">104</a>
+<tr><td></td><td><a href="../plateau/104/104.html">104</a>
 </td><td>No. in red (1977)</td></tr>
 
 <tr><td></td><td><a href="../plateau/105.htm">105</a>