diff --git a/Rakefile b/Rakefile
index 721c294b3..89e363d6b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -8,3 +8,8 @@ task :build do
   File.open('underscore-min.js', 'w') {|f| f.write(min) }
 end
 
+desc "Build the docco documentation"
+task :doc do
+  sh "docco underscore.js"
+end
+