diff --git a/modules/ProspectLists/ProspectList.php b/modules/ProspectLists/ProspectList.php
index ff3d1fe8c1f..2264456a55e 100755
--- a/modules/ProspectLists/ProspectList.php
+++ b/modules/ProspectLists/ProspectList.php
@@ -427,7 +427,7 @@ public function save($check_notify = false)
 
     public function mark_deleted($id)
     {
-        $query = "UPDATE prospect_lists_prospects SET deleted = 1, date_modified = NOW() WHERE prospect_list_id = '{$id}' AND deleted = 0";
+        $query = "UPDATE prospect_lists_prospects SET deleted = 1, date_modified = UTC_TIMESTAMP() WHERE prospect_list_id = '{$id}' AND deleted = 0";
         $this->db->query($query);
         return parent::mark_deleted($id);
     }