1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/international/mule-cmds.el b/lisp/international/mule-cmds.el
index abda95f64dd..f075a5affbc 100644
--- a/lisp/international/mule-cmds.el
+++ b/lisp/international/mule-cmds.el
@@ -378,6 +378,7 @@ and TO is ignored."
                      (find-charset-region from to)))
          (safe-coding-systems (find-coding-systems-for-charsets charsets)))
     (if (or (eq (car safe-coding-systems) 'undecided)
+            (eq default-coding-system 'no-conversion)
             (and default-coding-system
                  (memq (coding-system-base default-coding-system)
                        safe-coding-systems)))