diff --git a/index.php b/index.php
index 404d7ef..858bc35 100644
--- a/index.php
+++ b/index.php
@@ -102,7 +102,8 @@ $taglines = file("taglines.txt");
 
 		<hr>
         <footer>
-            <a href="https://tildegit.org/ben/tilde">page source</a>
+            <?php exec("git describe --always", $sha); ?>
+            <a href="https://tildegit.org/ben/tilde/src/commit/<?=$sha[0]?>">page source</a>
         </footer>
     </main>