diff --git a/modules/email/notmuch/config.el b/modules/email/notmuch/config.el
index 75b660351..4a6536359 100644
--- a/modules/email/notmuch/config.el
+++ b/modules/email/notmuch/config.el
@@ -46,7 +46,7 @@
   ;; (setq-hook! 'notmuch-show-mode-hook line-spacing 0)
 
   ;; only unfold unread messages in thread by default
-  (add-hook 'notmuch-show-hook '+notmuch-show-expand-only-unread-h)
+  (add-hook 'notmuch-show-hook #'+notmuch-show-expand-only-unread-h)
 
   (add-hook 'doom-real-buffer-functions #'notmuch-interesting-buffer)