diff --git a/tex.el b/tex.el
index 7db7b78022c..7e98bd7b667 100644
--- a/tex.el
+++ b/tex.el

@@ -2572,10 +2572,11 @@ and must not contain a `..' component."

(defcustom TeX-output-dir nil

"The path of the directory where output files should be placed.

-A relative path is interpreted as being relative to the master

-file in `TeX-master'. The path cannot contain a directory that

-starts with '.'. If this variable is nil, the output directory

-is assumed to be the same as the directory of `TeX-master'."

+A relative path is interpreted as being relative to the master file in

+`TeX-master'. Subdirectories of `TeX-master' are considered safe,

+otherwise the user asked for permission. If this variable is nil, the

+output directory is assumed to be the same as the directory of

+`TeX-master'."

:group 'TeX-file

:safe #'TeX--output-dir-safe-p

:type '(choice (const :tag "Directory of master file" nil)