CRM-12272

diff --git a/CRM/Event/Form/Registration/AdditionalParticipant.php b/CRM/Event/Form/Registration/AdditionalParticipant.php
index e946064d21d8391db126680ccda27a8bc203c0ee..6dc4850862e304992beb8950e8dea4698ac4f803 100644 (file)
--- a/CRM/Event/Form/Registration/AdditionalParticipant.php
+++ b/CRM/Event/Form/Registration/AdditionalParticipant.php
@@ -440,7 +440,7 @@ class CRM_Event_Form_Registration_AdditionalParticipant extends CRM_Event_Form_R
             }
             else {
               // check with first_name and last_name for additional participants
-              if (!empty($value['first_name']) && (CRM_Utils_Array::value('first_name', $value) == CRM_Utils_Array::value('first_name', $fields)) &&
+              if (!empty($value['first_name']) && ($value['first_name'] == CRM_Utils_Array::value('first_name', $fields)) &&
                 (CRM_Utils_Array::value('last_name',$value) == CRM_Utils_Array::value('last_name', $fields))
               ) {
                 $errors['first_name'] = ts('The first name and last name must be unique for each participant.');