diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 215579180..751550118 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -660,6 +660,9 @@ module ApplicationHelper
   #     export:some/file -> Force the download of the file
   #   Forum messages:
   #     message#1218 -> Link to message with id 1218
+  #  Projects:
+  #     project:someproject -> Link to project named "someproject"
+  #     project#3 -> Link to project with id 3
   #
   #   Links can refer other objects from other projects, using project identifier:
   #     identifier:r52