diff --git a/app/controllers/tickets_controller.rb b/app/controllers/tickets_controller.rb
index 3a947f1a1..90a042ca1 100644
--- a/app/controllers/tickets_controller.rb
+++ b/app/controllers/tickets_controller.rb
@@ -155,6 +155,7 @@ class TicketsController < ApplicationController
     users = {}
     users[ ticket.owner_id ] = User.user_data_full( ticket.owner_id )
     users[ ticket.customer_id ] = User.user_data_full( ticket.customer_id )
+    history_list = []
     history.each do |item|
 
       users[ item[:created_by_id] ] = User.user_data_full( item[:created_by_id] )