1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index dd266ce8ae1..ea5aca6b898 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -517,7 +517,7 @@ and use this command with a prefix argument (the value does not matter)."
              (string-match "\\.z$" file))
            (if (not (dired-check-process (concat "Uncompressing " file)
                                          "gunzip" file))
-               (substring file 0 -3)))
+               (substring file 0 -2)))
           (t
            ;;; Try gzip; if we don't have that, use compress.
            (condition-case nil