drush update to 6.x-1.1 fails

drush up or upc fails with to update from 6.x-1.0 to 6.x-1.1 with this error:
"Fatal error: Call to undefined function _login_security_menu() in /var/www/sites/photodebate.com/www/html/sites/all/modules/login_security/login_security.module on line 48"

as a workaround, just upgrade the module manually, remove the folder and replace with the new one, then you could drush updb and this works.. i dont think the failure affects the site in any way

im not sure this isnt a bug in drush actually, feel free to move the issue if it is, thing is it calls the old module's hook_menu, i guess the loaded .module file is from the old one when it gets called.