diff --git a/ldap_authentication/ldap_authentication.module b/ldap_authentication/ldap_authentication.module
index aa3dbc1..6580d0e 100644
--- a/ldap_authentication/ldap_authentication.module
+++ b/ldap_authentication/ldap_authentication.module
@@ -328,7 +328,7 @@ function ldap_authentication_form_user_login_block_alter(&$form, &$form_state) {
  */
 function ldap_authentication_user_login_authenticate_validate($form, &$form_state) {
   require_once('ldap_authentication.inc');
-  _ldap_authentication_user_login_authenticate_validate($form_state);
+  return _ldap_authentication_user_login_authenticate_validate($form_state);
 }
 
 /**