diff --git a/session.php b/session.php
index a87d602f..e4eb82a6 100644
--- a/session.php
+++ b/session.php
@@ -71,7 +71,7 @@ function read(string $id)
     {
 		$this->sid=$id;
 		if (!$data=$this->_cache->get($id.'.@'))
-			return false;
+			return '';
 		$this->_data = $data;
 		if ($data['ip']!=$this->_ip || $data['agent']!=$this->_agent) {
 			$fw=Base::instance();