diff --git a/app/controllers/issues_controller.rb b/app/controllers/issues_controller.rb
index c8778b473..1bf969cd5 100644
--- a/app/controllers/issues_controller.rb
+++ b/app/controllers/issues_controller.rb
@@ -90,7 +90,9 @@ class IssuesController < ApplicationController
 
       respond_to do |format|
         format.html { render :template => 'issues/index.rhtml', :layout => !request.xhr? }
-        format.api
+        format.api  { 
+          Issue.load_relations(@issues) if include_in_api_response?('relations')
+        }
         format.atom { render_feed(@issues, :title => "#{@project || Setting.app_title}: #{l(:label_issue_plural)}") }
         format.csv  { send_data(issues_to_csv(@issues, @project), :type => 'text/csv; header=present', :filename => 'export.csv') }
         format.pdf  { send_data(issues_to_pdf(@issues, @project, @query), :type => 'application/pdf', :filename => 'export.pdf') }
diff --git a/app/models/issue.rb b/app/models/issue.rb
index 48a0afb2a..ccd326552 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -508,7 +508,17 @@ class Issue < ActiveRecord::Base
   end
 
   def relations
-    (relations_from + relations_to).sort
+    @relations ||= (relations_from + relations_to).sort
+  end
+  
+  # Preloads relations for a collection of issues
+  def self.load_relations(issues)
+    if issues.any?
+      relations = IssueRelation.all(:conditions => ["issue_from_id IN (:ids) OR issue_to_id IN (:ids)", {:ids => issues.map(&:id)}])
+      issues.each do |issue|
+        issue.instance_variable_set "@relations", relations.select {|r| r.issue_from_id == issue.id || r.issue_to_id == issue.id}
+      end
+    end
   end
   
   # Finds an issue relation given its id.
diff --git a/app/views/issues/index.api.rsb b/app/views/issues/index.api.rsb
index 1ec2acc10..2c09df41b 100644
--- a/app/views/issues/index.api.rsb
+++ b/app/views/issues/index.api.rsb
@@ -23,6 +23,12 @@ api.array :issues, api_meta(:total_count => @issue_count, :offset => @offset, :l
       
       api.created_on issue.created_on
       api.updated_on issue.updated_on
+      
+      api.array :relations do
+        issue.relations.each do |relation|
+          api.relation(:id => relation.id, :issue_id => relation.issue_from_id, :issue_to_id => relation.issue_to_id, :relation_type => relation.relation_type, :delay => relation.delay)
+        end
+      end if include_in_api_response?('relations')
     end
   end
 end
diff --git a/test/integration/api_test/issues_test.rb b/test/integration/api_test/issues_test.rb
index 3dbd229a2..117dde1b1 100644
--- a/test/integration/api_test/issues_test.rb
+++ b/test/integration/api_test/issues_test.rb
@@ -47,7 +47,7 @@ class ApiTest::IssuesTest < ActionController::IntegrationTest
     Setting.rest_api_enabled = '1'
   end
 
-  context "/index.xml" do
+  context "/issues" do
     # Use a private project to make sure auth is really working and not just
     # only showing public issues.
     should_allow_api_authentication(:get, "/projects/private-child/issues.xml")
@@ -102,6 +102,25 @@ class ApiTest::IssuesTest < ActionController::IntegrationTest
       end
     end
     
+    context "with relations" do
+      should "display relations" do
+        get '/issues.xml?include=relations'
+        
+        assert_response :success
+        assert_equal 'application/xml', @response.content_type
+        assert_tag 'relations',
+          :parent => {:tag => 'issue', :child => {:tag => 'id', :content => '3'}},
+          :children => {:count => 1},
+          :child => {
+            :tag => 'relation',
+            :attributes => {:id => '2', :issue_id => '2', :issue_to_id => '3', :relation_type => 'relates'}
+          }
+        assert_tag 'relations',
+          :parent => {:tag => 'issue', :child => {:tag => 'id', :content => '1'}},
+          :children => {:count => 0}
+      end
+    end
+    
     context "with invalid query params" do
       should "return errors" do
         get '/issues.xml', {:f => ['start_date'], :op => {:start_date => '='}}