1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/eshell/esh-opt.el b/lisp/eshell/esh-opt.el
index 6807e1a4f02..2187d614228 100644
--- a/lisp/eshell/esh-opt.el
+++ b/lisp/eshell/esh-opt.el
@@ -194,7 +194,7 @@ switch is unrecognized."
           (setq extcmd (eshell-search-path (cadr extcmd)))
           (if extcmd
               (throw 'eshell-ext-command extcmd)
-            (if (char-valid-p switch)
+            (if (characterp switch)
                 (error "%s: unrecognized option -%c" name switch)
               (error "%s: unrecognized option --%s" name switch))))))))