diff --git a/config.el b/config.el
index 1ab2035..2b48b16 100644
--- a/config.el
+++ b/config.el
@@ -884,6 +884,8 @@ Skip for beamer exports — beamer uses adjustbox on plain tabular."
 ;; Three layers of insurance: dirvish-hide-details, dired-mode-hook,
 ;; and dired-after-readin-hook (catches late buffer setup).
 (add-hook 'dired-mode-hook #'dired-hide-details-mode)
+;; Attach marked files to mail compose buffer via C-c RET C-a
+(add-hook 'dired-mode-hook #'turn-on-gnus-dired-mode)
 (add-hook 'dired-after-readin-hook
           (lambda () (unless dired-hide-details-mode
                        (dired-hide-details-mode 1))))