diff --git a/lib/tasks/whitespace.rake b/lib/tasks/whitespace.rake
index 48578b3ee..a96baa4f9 100644
--- a/lib/tasks/whitespace.rake
+++ b/lib/tasks/whitespace.rake
@@ -3,5 +3,8 @@ namespace :whitespace do
   task :clean do
     sh %{find . -name '*.rb' -exec sed -i '' 's/ *$//g' {} \\;}
   end
+  task :retab do
+    sh %{find . -name '*.rb' -exec sed -i '' 's/\t/  /g' {} \\;}
+  end
 end