diff --git a/app/helpers/issues_helper.rb b/app/helpers/issues_helper.rb
index f1ddcfcbf..d84ec6c97 100644
--- a/app/helpers/issues_helper.rb
+++ b/app/helpers/issues_helper.rb
@@ -28,7 +28,16 @@ module IssuesHelper
       ancestors << issue unless issue.leaf?
     end
   end
-  
+
+  # Renders a HTML/CSS tooltip
+  #
+  # To use, a trigger div is needed.  This is a div with the class of "tooltip"
+  # that contains this method wrapped in a span with the class of "tip"
+  #
+  #    <div class="tooltip"><%= link_to_issue(issue) %>
+  #      <span class="tip"><%= render_issue_tooltip(issue) %></span>
+  #    </div>
+  #
   def render_issue_tooltip(issue)
     @cached_label_status ||= l(:field_status)
     @cached_label_start_date ||= l(:field_start_date)