diff --git a/lib/gollum/frontend/app.rb b/lib/gollum/frontend/app.rb
index 0d6be29b..bdc9f1e4 100644
--- a/lib/gollum/frontend/app.rb
+++ b/lib/gollum/frontend/app.rb
@@ -141,6 +141,7 @@ module Precious
         @content = page.formatted_data
         mustache :page
       elsif file = wiki.file(name)
+        content_type MIME::Types.type_for(name).to_s
         file.raw_data
       else
         @name = name