diff --git a/lib/redmine/helpers/time_report.rb b/lib/redmine/helpers/time_report.rb
index 2c71f098b..14a09694e 100644
--- a/lib/redmine/helpers/time_report.rb
+++ b/lib/redmine/helpers/time_report.rb
@@ -45,10 +45,10 @@ module Redmine
         unless @criteria.empty?
           time_columns = %w(tyear tmonth tweek spent_on)
           @hours = []
-          @scope.sum(:hours,
-              :include => [:issue, :activity],
-              :group => @criteria.collect{|criteria| @available_criteria[criteria][:sql]} + time_columns,
-              :joins => @criteria.collect{|criteria| @available_criteria[criteria][:joins]}.compact).each do |hash, hours|
+          @scope.includes(:issue, :activity).
+              group(@criteria.collect{|criteria| @available_criteria[criteria][:sql]} + time_columns).
+              joins(@criteria.collect{|criteria| @available_criteria[criteria][:joins]}.compact).
+              sum(:hours).each do |hash, hours|
             h = {'hours' => hours}
             (@criteria + time_columns).each_with_index do |name, i|
               h[name] = hash[i]