diff --git a/lisp/international/mule.el b/lisp/international/mule.el
index ba4fcef628b58f06ed6c7cd49ba19b3adf0d1966..d356736071d979d5f7a006ef0219bf7b565af0e2 100644
--- a/lisp/international/mule.el
+++ b/lisp/international/mule.el
@@ -1569,7 +1569,7 @@ text, and convert it in the temporary buffer.  Otherwise, convert in-place."
 (defcustom auto-coding-alist
   '(("\\.\\(arc\\|zip\\|lzh\\|zoo\\|[jew]ar\\|xpi\\)\\'" . no-conversion)
     ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|[JEW]AR\\|XPI\\)\\'" . no-conversion)
-    ("\\.\\(sx[dmicw]\\|tar\\|tgz\\)\\'" . no-conversion)
+    ("\\.\\(sx[dmicw]\\|odt\\|tar\\|tgz\\)\\'" . no-conversion)
     ("\\.\\(gz\\|Z\\|bz\\|bz2\\|gpg\\)\\'" . no-conversion)
     ("\\.\\(jpe?g\\|png\\|gif\\|tiff?\\|p[bpgn]m\\)\\'" . no-conversion)
     ("/#[^/]+#\\'" . emacs-mule))