diff --git a/CRM/Activity/BAO/Activity.php b/CRM/Activity/BAO/Activity.php
index 14581f6365a431f86fb863ca351178befb7c9dc8..b5028c7f7b1c9afd318ba9143388e8167fb30a08 100644
--- a/CRM/Activity/BAO/Activity.php
+++ b/CRM/Activity/BAO/Activity.php
@@ -96,8 +96,6 @@ class CRM_Activity_BAO_Activity extends CRM_Activity_DAO_Activity {
       $sourceID = CRM_Utils_Array::key('Activity Source', $activityContacts);
       $assigneeID = CRM_Utils_Array::key('Activity Assignees', $activityContacts);
 
-      $defaults['source_contact'] = CRM_Activity_BAO_ActivityContact::retrieveContactIdsByActivityId($activity->id, $sourceID);
-
       // TODO: at some stage we'll have to deal
       // TODO: with multiple values for assignees and targets, but
       // TODO: for now, let's just fetch first row