1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/obsolete/iswitchb.el b/lisp/obsolete/iswitchb.el
index ec92b96899a..55e81d08d1a 100644
--- a/lisp/obsolete/iswitchb.el
+++ b/lisp/obsolete/iswitchb.el
@@ -1247,7 +1247,7 @@ Modified from `icomplete-completions'."
 
     (if (and iswitchb-use-faces comps)
         (progn
-          (setq first (car comps))
+          (setq first (copy-sequence (car comps)))
           (setq first (format "%s" first))
           (put-text-property 0 (length first) 'face
                              (if (= (length comps) 1)