diff --git a/helpdesk/views/staff.py b/helpdesk/views/staff.py
index b4b1b8f5..2af5bd5d 100644
--- a/helpdesk/views/staff.py
+++ b/helpdesk/views/staff.py
@@ -570,7 +570,7 @@ def update_ticket(request, ticket_id, public=False):
     ticket.save()
 
     # auto subscribe user if enabled
-    if helpdesk_settings.HELPDESK_AUTO_SUBSCRIBE_ON_TICKET_RESPONSE:
+    if helpdesk_settings.HELPDESK_AUTO_SUBSCRIBE_ON_TICKET_RESPONSE and request.user.is_authenticated():
         ticketcc_string, SHOW_SUBSCRIBE = return_ticketccstring_and_show_subscribe(request.user, ticket)
         if SHOW_SUBSCRIBE:
             subscribe_staff_member_to_ticket(ticket, request.user)
diff --git a/setup.py b/setup.py
index 759a2b86..3b4f9ba0 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@ from distutils.util import convert_path
 from fnmatch import fnmatchcase
 from setuptools import setup, find_packages
 
-version = '0.1.10'
+version = '0.1.11'
 
 # Provided as an attribute, so you can append to these instead
 # of replicating them: