diff --git app/views/issues/show.api.rsb app/views/issues/show.api.rsb
index 072709e..f474ed9 100644
--- app/views/issues/show.api.rsb
+++ app/views/issues/show.api.rsb
@@ -59,6 +59,7 @@ api.issue do
         api.user(:id => journal.user_id, :name => journal.user.name) unless journal.user.nil?
         api.notes journal.notes
         api.created_on journal.created_on
+        api.private_notes journal.private_notes
         api.array :details do
           journal.visible_details.each do |detail|
             api.detail :property => detail.property, :name => detail.prop_key do
diff --git test/integration/api_test/issues_test.rb test/integration/api_test/issues_test.rb
index 8b23dcc..b1e1891 100644
--- test/integration/api_test/issues_test.rb
+++ test/integration/api_test/issues_test.rb
@@ -169,10 +169,13 @@ class Redmine::ApiTest::IssuesTest < Redmine::ApiTest::Base
   end
 
   test "GET /issues/:id.xml with journals" do
-    get '/issues/1.xml?include=journals'
+    Journal.find(2).update_attribute(:private_notes, true)
+
+    get '/issues/1.xml?include=journals', {}, credentials('jsmith')
 
     assert_select 'issue journals[type=array]' do
       assert_select 'journal[id="1"]' do
+        assert_select 'private_notes', :text => 'false'
         assert_select 'details[type=array]' do
           assert_select 'detail[name=status_id]' do
             assert_select 'old_value', :text => '1'
@@ -180,6 +183,10 @@ class Redmine::ApiTest::IssuesTest < Redmine::ApiTest::Base
           end
         end
       end
+      assert_select 'journal[id="2"]' do
+        assert_select 'private_notes', :text => 'true'
+        assert_select 'details[type=array]'
+      end
     end
   end