diff --git a/Rakefile b/Rakefile
index 38a111cc..6b70c955 100644
--- a/Rakefile
+++ b/Rakefile
@@ -93,13 +93,12 @@ def siteify_file(file, front_matter = {})
   title = contents.match(/\A# (.*)$/)[1]
   output_file = file.sub(/\.markdown\z/, ".md").downcase
   slug = File.basename(output_file, ".md")
-  default_frontmatter = {
+  front_matter = front_matter.merge({
     "title"     => title,
     "layout"    => "docs",
     "permalink" => "/docs/#{slug}/",
     "note"      => "This file is autogenerated. Edit /#{file} instead."
-  }
-  front_matter = front_matter.merge(default_frontmatter)
+  })
   contents.gsub!(/\A# #{title}\n\n?/, "")
   contents = converted_history(contents) if output_file == "history.md"
   contents = "#{front_matter.to_yaml}---\n\n#{contents}"