diff --git a/sudo.pages.inc b/sudo.pages.inc
index 4fb1ef0..dc7a1d7 100755
--- a/sudo.pages.inc
+++ b/sudo.pages.inc
@@ -121,7 +121,7 @@ function sudo_settings($form_state) {
  *
  * @ingroup themeable
  */
-function theme_sudo_checkboxes(&$form) {
+function theme_sudo_checkboxes($form) {
 
   $header[] = t('Users');
   foreach ($form['roles']['#value'] as $rid => $role_name) {