diff --git a/src/mibew/libs/operator.php b/src/mibew/libs/operator.php
index 6dcd2ecf..549c2077 100644
--- a/src/mibew/libs/operator.php
+++ b/src/mibew/libs/operator.php
@@ -144,7 +144,7 @@ function operator_by_code($code)
  *   would be sort in descending order and in ascending order overwise.
  *
  */
-function get_operators_list($options)
+function get_operators_list($options = array())
 {
     $db = Database::getInstance();
 
diff --git a/src/mibew/operator/groupmembers.php b/src/mibew/operator/groupmembers.php
index fbd31e9c..a3e3db5a 100644
--- a/src/mibew/operator/groupmembers.php
+++ b/src/mibew/operator/groupmembers.php
@@ -28,7 +28,7 @@ csrf_check_token();
 
 $group_id = verify_param("gid", "/^\d{1,9}$/");
 $page = array('groupid' => $group_id);
-$page['operators'] = get_operators_list(array());
+$page['operators'] = get_operators_list();
 $page['errors'] = array();
 
 $group = group_by_id($group_id);