diff --git a/inc/core/Main.php b/inc/core/Main.php
index 27b289c..54609c8 100644
--- a/inc/core/Main.php
+++ b/inc/core/Main.php
@@ -156,7 +156,7 @@ abstract class Main
     {
         ini_set('session.use_only_cookies', 1);
         session_name('bat');
-        session_set_cookie_params(0, '/' . (!batflat_dir() ? '' : batflat_dir().'/'));
+        session_set_cookie_params(0, (batflat_dir() === '/' ? '/' : batflat_dir().'/'));
         session_start();
     }
 
diff --git a/inc/core/lib/functions.php b/inc/core/lib/functions.php
index 26aaa8b..2cbcda5 100644
--- a/inc/core/lib/functions.php
+++ b/inc/core/lib/functions.php
@@ -267,7 +267,7 @@ function domain($with_protocol = true)
  * @return string
  */
 function batflat_dir() {
-    return basename(str_replace(ADMIN, null, getcwd()));
+    return dirname(str_replace(ADMIN, null, $_SERVER['SCRIPT_NAME']));
 }
 
 /**