diff --git a/runtime/webdav-warmup-dispatch.php b/runtime/webdav-warmup-dispatch.php
index fa89528..ca47fb6 100644
--- a/runtime/webdav-warmup-dispatch.php
+++ b/runtime/webdav-warmup-dispatch.php
@@ -5,7 +5,7 @@ if (PHP_SAPI !== 'cli')
   exit;
 }
 
-$piwigo_root = realpath(dirname(__DIR__, 2));
+$piwigo_root = realpath(dirname(__DIR__, 3));
 if ($piwigo_root === false)
 {
   fwrite(STDERR, "Piwigo-Root wurde nicht gefunden.\n");