diff --git a/filters.inc.php b/filters.inc.php
index 39c3a07..485d349 100644
--- a/filters.inc.php
+++ b/filters.inc.php
@@ -139,7 +139,7 @@ function validate_flt_class(\taskman\ConfigFetchResult $fetch_result, \taskman\C
       if(strpos($conf_path, '@') === 0)
         $conf_path = substr($conf_path, 1) . '.conf.js';
 
-      $conf_path = \taskman\normalize_path(\taskman\config_real_path($config_globals->base_dirs, $conf_path), false);
+      $conf_path = \taskman\normalize_path(\taskman\config_real_path($config_globals->base_dirs, $conf_path));
 
       $conf_cache = $fetch_result->getByPath($conf_path);
     }