1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/files.el b/lisp/files.el
index 23e4948e71a..849c642fe76 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -1940,6 +1940,7 @@ is specified, returning t if it is specified."
 (put 'mode-line-buffer-identification 'risky-local-variable t)
 (put 'mode-line-modes 'risky-local-variable t)
 (put 'mode-line-position 'risky-local-variable t)
+(put 'display-time-string-forms 'risky-local-variable t)
 
 ;; This one is safe because the user gets to check it before it is used.
 (put 'compile-command 'safe-local-variable t)