diff --git a/zengine/messaging/model.py b/zengine/messaging/model.py
index ee362659..8c89810e 100644
--- a/zengine/messaging/model.py
+++ b/zengine/messaging/model.py
@@ -176,7 +176,7 @@ class Subscriber(Model):
     is_visible = field.Boolean("Show under user's channel list", default=True)
     can_manage = field.Boolean("Can manage this channel", default=False)
     can_leave = field.Boolean("Membership is not obligatory", default=True)
-    last_seen_msg_time = field.DateTime("Last seen message's time")
+    last_seen_msg_time = field.TimeStamp("Last seen message's time")
 
     # status = field.Integer("Status", choices=SUBSCRIPTION_STATUS)
 
diff --git a/zengine/messaging/views.py b/zengine/messaging/views.py
index d1cebb9d..6834edb7 100644
--- a/zengine/messaging/views.py
+++ b/zengine/messaging/views.py
@@ -238,7 +238,9 @@ def report_last_seen_message(current):
     Subscriber(current).objects.filter(channel_id=current.input['channel_key'],
                                        user_id=current.user_id
                                        ).update(last_seen_msg_time=current.input['timestamp'])
-
+    current.output = {
+        'status': 'OK',
+        'code': 200}
 
 def list_channels(current):
     """