diff --git a/permissions_lock.module b/permissions_lock.module
index 47928d9..6f6962d 100755
--- a/permissions_lock.module
+++ b/permissions_lock.module
@@ -144,6 +144,7 @@ function permissions_lock_form_validate($form, &$form_state) {
  * Helper function to retrieve the permissions that are available in the permissions form
  */
 function _permissions_lock_get_form_available_permissions($form) {
+  $available_permissions = array();
   if (!empty($form['permission'])) {
     foreach ($form['permission'] as $permission => $value) {
       if (!is_numeric($permission)) {
@@ -189,7 +190,7 @@ function _permissions_lock_cleanup_orphan_headers(&$form) {
  */
 function _permissions_lock_get_available_permissions($exclude_hook = TRUE) {
   // Render role/permission overview:
-  $options = array();
+  $available_permissions = array();
   foreach (module_list(FALSE, FALSE, TRUE) as $module) {
     if ($permissions = module_invoke($module, 'permission')) {
       asort($permissions);