diff --git a/app/models/action_tracker_notification.rb b/app/models/action_tracker_notification.rb
index dda665c..c014641 100644
--- a/app/models/action_tracker_notification.rb
+++ b/app/models/action_tracker_notification.rb
@@ -8,6 +8,8 @@ class ActionTrackerNotification < ActiveRecord::Base
   validates_presence_of :profile_id, :action_tracker_id
   validates_uniqueness_of :action_tracker_id, :scope => :profile_id
 
+  attr_accessible :profile_id, :action_tracker_id
+
 end
 
 ActionTracker::Record.has_many :action_tracker_notifications, :class_name => 'ActionTrackerNotification', :foreign_key => 'action_tracker_id', :dependent => :destroy
diff --git a/lib/notify_activity_to_profiles_job.rb b/lib/notify_activity_to_profiles_job.rb
index 4e2400c..7939238 100644
--- a/lib/notify_activity_to_profiles_job.rb
+++ b/lib/notify_activity_to_profiles_job.rb
@@ -9,6 +9,7 @@ class NotifyActivityToProfilesJob < Struct.new(:tracked_action_id)
   def perform
     return unless ActionTracker::Record.exists?(tracked_action_id)
     tracked_action = ActionTracker::Record.find(tracked_action_id)
+    return unless tracked_action.user.present?
     target = tracked_action.target
     if target.is_a?(Community) && NOTIFY_ONLY_COMMUNITY.include?(tracked_action.verb)
       ActionTrackerNotification.create(:profile_id => target.id, :action_tracker_id => tracked_action.id)
--
libgit2 0.21.2