diff --git a/app/models/project.rb b/app/models/project.rb
index c9d00e9..c3b5530 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -118,6 +118,11 @@ class Project < ActiveRecord::Base
     visible(user).find(:all, :limit => count, :order => "created_on DESC")	
   end	
 
+  # Returns true if the project is visible to +user+ or to the current user.
+  def visible?(user=User.current)
+    user.allowed_to?(:view_project, self)
+  end
+  
   def self.visible_by(user=nil)
     ActiveSupport::Deprecation.warn "Project.visible_by is deprecated and will be removed in Redmine 1.3.0. Use Project.visible_condition instead."
     visible_condition(user || User.current)
diff --git a/app/views/projects/index.api.rsb b/app/views/projects/index.api.rsb
index 121300c..552c1f6 100644
--- a/app/views/projects/index.api.rsb
+++ b/app/views/projects/index.api.rsb
@@ -5,7 +5,7 @@ api.array :projects, api_meta(:total_count => @project_count, :offset => @offset
       api.name        project.name
       api.identifier  project.identifier
       api.description project.description
-      api.parent(:id => project.parent_id, :name => project.parent.name) unless project.parent.nil?
+      api.parent(:id => project.parent.id, :name => project.parent.name) if project.parent && project.parent.visible?
       
       render_api_custom_values project.visible_custom_field_values, api
       
diff --git a/app/views/projects/show.api.rsb b/app/views/projects/show.api.rsb
index e08f77b..561896a 100644
--- a/app/views/projects/show.api.rsb
+++ b/app/views/projects/show.api.rsb
@@ -4,6 +4,7 @@ api.project do
   api.identifier  @project.identifier
   api.description @project.description
   api.homepage    @project.homepage
+  api.parent(:id => @project.parent.id, :name => @project.parent.name) if @project.parent && @project.parent.visible?
   
   render_api_custom_values @project.visible_custom_field_values, api