1 files changed, 1 insertions, 2 deletions

diff --git a/src/luarocks/upload/multipart.lua b/src/luarocks/upload/multipart.lua
index 56776570..57aad42d 100644
--- a/src/luarocks/upload/multipart.lua
+++ b/src/luarocks/upload/multipart.lua
@@ -19,9 +19,8 @@ function File:mime()
       local mimetypes_ok, mimetypes = pcall(require, "mimetypes")
       if mimetypes_ok then
          self.mimetype = mimetypes.guess(self.fname)
-      else
-         self.mimetype = "application/octet-stream"
       end
+      self.mimetype = self.mimetype or "application/octet-stream"
    end
    return self.mimetype
 end