diff --git a/runtime/lib/webdav-warmup-audit.php b/runtime/lib/webdav-warmup-audit.php
index cd2bfa0..38e44a6 100644
--- a/runtime/lib/webdav-warmup-audit.php
+++ b/runtime/lib/webdav-warmup-audit.php
@@ -5,7 +5,7 @@ if (PHP_SAPI !== 'cli')
   exit;
 }
 
-$piwigo_root = realpath(dirname(__DIR__, 3));
+$piwigo_root = realpath(dirname(__DIR__, 4));
 if ($piwigo_root === false)
 {
   fwrite(STDERR, "Piwigo-Root wurde nicht gefunden.\n");