diff --git a/lib/ldap_login/login.rb b/lib/ldap_login/login.rb
index 39b8c8f..e6311b5 100644
--- a/lib/ldap_login/login.rb
+++ b/lib/ldap_login/login.rb
@@ -13,7 +13,7 @@ module LdapLogin::Login
         ldap = Net::LDAP.new
         ldap.host = ldap_host
         ldap.port = 389
-        ldap.auth #{ldap_user}@asia.edu.tw, ldap_pass
+        ldap.auth "#{ldap_user}@asia.edu.tw", ldap_pass
         if ldap.bind
           puts ['ldap_user',ldap_user,'ldap_pass',ldap_pass]
           if !user.nil?