1 files changed, 4 insertions, 4 deletions

diff --git a/lisp/gnus/nnmail.el b/lisp/gnus/nnmail.el
index 249bd65a9d7..d751f182e30 100644
--- a/lisp/gnus/nnmail.el
+++ b/lisp/gnus/nnmail.el
@@ -1250,10 +1250,10 @@ Return the number of characters in the body."
     (insert (format "Xref: %s" (system-name)))
     (while group-alist
       (insert (if (mm-multibyte-p)
-                  (string-as-multibyte
-                   (format " %s:%d" (caar group-alist) (cdar group-alist)))
-                (string-as-unibyte
-                 (format " %s:%d" (caar group-alist) (cdar group-alist)))))
+                  (format " %s:%d" (caar group-alist) (cdar group-alist))
+                (encode-coding-string
+                 (format " %s:%d" (caar group-alist) (cdar group-alist))
+                 'utf-8)))
       (setq group-alist (cdr group-alist)))
     (insert "\n")))