diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 2c46e52d8..e63f79466 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -14,7 +14,7 @@ class PostsController < ApplicationController
       format.atom
       format.xml do
         render :xml => @posts.to_xml(:root => "posts") {|builder|
-          builder.tag!(:total_count, @posts.total_count)
+          builder.tag!("total-count", @posts.total_count)
         }
       end
     end