diff --git a/build/ZabbixApiAbstract.class.php b/build/ZabbixApiAbstract.class.php
index 22b7ae2..899b24e 100644
--- a/build/ZabbixApiAbstract.class.php
+++ b/build/ZabbixApiAbstract.class.php
@@ -504,7 +504,7 @@ final public function userLogin($params=array(), $arrayKeyProperty='', $tokenCac
 
         // build filename for cached auth token
         if($tokenCacheDir && array_key_exists('user', $params) && is_dir($tokenCacheDir))
-            $tokenCacheFile = $tokenCacheDir.'/.zabbixapi-token-'.md5($params['user'].posix_getuid());
+            $tokenCacheFile = $tokenCacheDir.'/.zabbixapi-token-'.md5($params['user'].'|'.posix_getuid());
 
         // try to read cached auth token
         if(isset($tokenCacheFile) && is_file($tokenCacheFile))