diff --git a/action.php b/action.php
index 8f196cb..e9516fc 100644
--- a/action.php
+++ b/action.php
@@ -176,6 +176,12 @@ public function logAccess($page, $status, $size, $referer = '') {
         $log = basename($this->getConf('accesslog'));
         if($dir == '.' || $dir == '' || !is_dir($dir)){
             $dir = fullpath($conf['metadir'].'/'.$dir);
+        } else {
+            // needed if $dir is a relative but existing path ("../../" for example)
+            // do not use fullpath(), doesn't seem to work here, probably because $_SERVER['SCRIPT_FILENAME'] is not
+            // properly defined
+            chdir($conf['metadir']);
+            $dir = realpath($dir);
         }
 
         return io_saveFile("$dir/$log", $logline, true);