diff --git a/lisp/treesit.el b/lisp/treesit.el
index e0bcbe965c6..27019742777 100644
--- a/lisp/treesit.el
+++ b/lisp/treesit.el
@@ -2949,7 +2949,8 @@ when a major mode sets it.")
 
 (defun treesit-outline-search (&optional bound move backward looking-at)
   "Search for the next outline heading in the syntax tree.
-See the descriptions of arguments in `outline-search-function'."
+For BOUND, MOVE, BACKWARD, LOOKING-AT, see the descriptions in
+`outline-search-function'."
   (if looking-at
       (when-let* ((node (or (treesit-thing-at (pos-eol) treesit-outline-predicate)
                             (treesit-thing-at (pos-bol) treesit-outline-predicate)))
@@ -3058,6 +3059,10 @@ If `treesit-defun-name-function' is non-nil, set up
 
 If `treesit-simple-imenu-settings' is non-nil, set up Imenu.
 
+If `treesit-outline-predicate' or `treesit-simple-imenu-settings', and
+Outline minor mode settings don't alreay exist, setup Outline minor
+mode.
+
 If `sexp', `sentence' are defined in `treesit-thing-settings',
 enable tree-sitter navigation commands for them.