diff --git a/Access_Core.php b/Access_Core.php
index 7880b97..fbb26d3 100644
--- a/Access_Core.php
+++ b/Access_Core.php
@@ -342,7 +342,7 @@ class Access_Core
     {
         $entrypoint = $this->request->getReferer();
         if ($entrypoint == null) {
-            $entrypoint = Typecho_Cookie::get('__typecho_access_entrypoint');
+            $entrypoint = Typecho_Cookie::get('__typecho_access_entrypoint')?:'';
         }
         if (parse_url($entrypoint, PHP_URL_HOST) == parse_url(Helper::options()->siteUrl, PHP_URL_HOST)) {
             $entrypoint = '';
@@ -375,6 +375,9 @@ class Access_Core
 
         $entrypoint = $this->getEntryPoint();
         $referer = $this->request->getReferer();
+        if (empty($referer)){
+            $referer = '';
+        }
         $time = Helper::options()->gmtTime + (Helper::options()->timezone - Helper::options()->serverTimezone);
 
         if ($archive != null) {