diff --git a/lib/linguist/language.rb b/lib/linguist/language.rb
index 0a8d3d54..a2953e91 100644
--- a/lib/linguist/language.rb
+++ b/lib/linguist/language.rb
@@ -25,7 +25,7 @@ module Linguist
     #
     # Returns an array
     def self.detectable_markup
-      ["CSS", "Less", "Sass"]
+      ["CSS", "Less", "Sass", "Markdown", "Textile", "reStructuredText"]
     end
 
     # Internal: Create a new Language object