diff --git a/lib/units/storage/temp.js b/lib/units/storage/temp.js
index 3ec030f4..363ced16 100644
--- a/lib/units/storage/temp.js
+++ b/lib/units/storage/temp.js
@@ -142,7 +142,7 @@ module.exports = function(options) {
       res.sendFile(file.path)
     }
     else {
-      res.send(404)
+      res.sendStatus(404)
     }
   })