diff --git a/app/controllers/contributions_controller.rb b/app/controllers/contributions_controller.rb
index 490478988..066d2d669 100644
--- a/app/controllers/contributions_controller.rb
+++ b/app/controllers/contributions_controller.rb
@@ -17,15 +17,18 @@ class ContributionsController < ApplicationController
       @contribution_rate = Hash.new
       @static_total_per_user = g.rep_stats(project_id, :rev => rev)
       @static_total_per_user.each do |static|
-        uname = static.uname
-        change_num = static.changes
+        uname = static.uname.to_s
+        change_num = static.changes.to_i
         Rails.logger.info(uname)
         Rails.logger.info(change_num)
         if @contribution_rate.has_key?(uname)
           @contribution_rate[uname] += change_num
+          Rails.logger.info("has key")
           Rails.logger.info(@contribution_rate[uname])
         else
           @contribution_rate[uname] = change_num
+          Rails.logger.info("does not has key")
+          Rails.logger.info(@contribution_rate[uname])
         end
         count_all += change_num
         Rails.logger.info(count_all)