1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/international/mule-util.el b/lisp/international/mule-util.el
index 7c51409422b..8ac56b4bd65 100644
--- a/lisp/international/mule-util.el
+++ b/lisp/international/mule-util.el
@@ -327,6 +327,7 @@ coding systems ordered by priority."
          (mapc (function (lambda (x) (set (car x) (cdr x))))
                prio-list)
          (set-coding-priority (mapcar #'car prio-list))
+         ;; Changing the binding of a coding category requires this call.
          (update-coding-systems-internal)
          (detect-coding-region ,from ,to))
      ;; We must restore the internal database.