diff --git a/bt5/erp5_system_event/WorkflowTemplateItem/portal_workflow/system_event_workflow/transition_acknowledge.xml b/bt5/erp5_system_event/WorkflowTemplateItem/portal_workflow/system_event_workflow/transition_acknowledge.xml
index 1dff1e879c87756e5c5228904bc5f85f96f39515..ac601eb50706d5b25a976364b3810b2868de8db9 100644
--- a/bt5/erp5_system_event/WorkflowTemplateItem/portal_workflow/system_event_workflow/transition_acknowledge.xml
+++ b/bt5/erp5_system_event/WorkflowTemplateItem/portal_workflow/system_event_workflow/transition_acknowledge.xml
@@ -50,6 +50,7 @@
             <value>
               <tuple>
                 <string>Assignor</string>
+                <string>Assignee</string>
                 <string>Manager</string>
               </tuple>
             </value>