diff --git a/etc/conf.org b/etc/conf.org
index 5f2ffcd..43281b9 100644
--- a/etc/conf.org
+++ b/etc/conf.org
@@ -302,9 +302,10 @@ desktop file exec directive."
   
 (defun nd/get-mime-type (file)
   "Get the mime type of FILE."
-  (let* ((cmd (format "file --mime-type -b '%s'" file))
-         (mt (shell-command-to-string cmd)))
-    (replace-regexp-in-string "\n\\'" "" mt)))
+  (->> (shell-quote-argument file)
+       (format "file --mime-type -b %s")
+       (shell-command-to-string)
+       (s-trim)))
 
 (defconst nd/device-mount-dirs
   (list