diff --git a/inc/auth/ldap.class.php b/inc/auth/ldap.class.php
index f3060637960c3f50e30824bf61801a3e96872d91..dd328d4d457dda1bbdd0ce4ddfbf9cfaaaad392f 100644
--- a/inc/auth/ldap.class.php
+++ b/inc/auth/ldap.class.php
@@ -273,7 +273,7 @@ class auth_ldap extends auth_basic {
     function _openLDAP(){
         if($this->con) return true; // connection already established
 
-        $port = ($this->cnf['port']) ? $this->cnf['port'] : 636;
+        $port = ($this->cnf['port']) ? $this->cnf['port'] : 389;
         $this->con = @ldap_connect($this->cnf['server'],$port);
         if(!$this->con){
             msg("LDAP: couldn't connect to LDAP server",-1);