Add `customize' data

1 files changed, 3 insertions, 1 deletions

diff --git a/sx.el b/sx.el
index 8b2456d..4a5a275 100644
--- a/sx.el
+++ b/sx.el
@@ -173,7 +173,9 @@ is equivalent to
 (defcustom sx-init-hook nil
   "Hook run when stack-mode initializes.
 
-Run after `sx-init--internal-hook'.")
+Run after `sx-init--internal-hook'."
+  :group 'sx
+  :type 'hook)
 
 (defvar sx-init--internal-hook nil
   "Hook run when stack-mode initializes.