diff --git a/cave_data/1623-255.html b/cave_data/1623-255.html
index 50ca0f573..a50fc3532 100644
--- a/cave_data/1623-255.html
+++ b/cave_data/1623-255.html
@@ -50,7 +50,7 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
 <extent>10m N-S</extent>
 <survex_file>caves-1623/255/255.svx</survex_file><!-- Name of top-level survey file for this cave. Relative to the 'loser' survex repository. So for most caves that's "caves/cavenum/cavnum.svx". (e.g. caves/204/204.svx -->
 <description_file></description_file><!-- Path of top-level description file for this cave, when a separate file is used. Otherwise blank. -->
-<url>1623/255/255</url><!-- (Required). Relative URL of this cave. i.e the URL this cave appears at on the website, not including 'https://expo.survex.com/. Normally area/cavenum., e.g ('1623/000')-->
+<url>1623/255/255.html</url><!-- (Required). Relative URL of this cave. i.e the URL this cave appears at on the website, not including 'https://expo.survex.com/. Normally area/cavenum., e.g ('1623/000')-->
 </cave>
 </body>
 </html>