function activity(&$contactIDs, &$additionalContacts) {
static $_activitiesHandled = array();
- $activityContacts = CRM_Core_PseudoConstant::activityContacts('name');
+ $activityContacts = CRM_Core_OptionGroup::values('activity_contacts', FALSE, FALSE, FALSE, NULL, 'name');
$assigneeID = CRM_Utils_Array::key('Activity Assignees', $activityContacts);
$targetID = CRM_Utils_Array::key('Activity Targets', $activityContacts);