* lisp/outline.el (outline-minor-mode-prefix): Fix compilation.

diff --git a/lisp/outline.el b/lisp/outline.el
index aa8ed58ad9cab4c90b63ceb0ed1ad868a5f89f41..6158ed594e96fa5d094b9e211e5be3ae551eda77 100644 (file)
--- a/lisp/outline.el
+++ b/lisp/outline.el
@@ -297,6 +297,7 @@ The value of this variable is checked as part of loading Outline mode.
 After that, changing the prefix key requires manipulating keymaps."
   :type 'key-sequence
   :group 'outlines
+  :initialize 'custom-initialize-default
   :set (lambda (sym val)
          (define-key outline-minor-mode-map outline-minor-mode-prefix nil)
          (define-key outline-minor-mode-map val outline-mode-prefix-map)