diff --git a/silkmvc/core/mimes.lua b/silkmvc/core/mimes.lua
index 91edc7f..3cca274 100644
--- a/silkmvc/core/mimes.lua
+++ b/silkmvc/core/mimes.lua
@@ -76,6 +76,9 @@ function std.extra_mime(name)
 end
 
 function std.mimeOf(name)
+    if ulib.is_dir(name) then
+        return "dir"
+    end
     local mime = std.mime(utils.ext(name))
     if mime ~= "application/octet-stream" then
         return mime