1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/complete.el b/lisp/complete.el
index 5b77c72ff01..1bf418ed547 100644
--- a/lisp/complete.el
+++ b/lisp/complete.el
@@ -97,6 +97,7 @@
   :group 'minibuffer
   :group 'convenience)
 
+;;;###autoload
 (defcustom partial-completion-mode nil
   "Toggle Partial Completion mode.
 When Partial Completion mode is enabled, TAB (or M-TAB if `PC-meta-flag' is
@@ -829,7 +830,7 @@ or properties are considered."
                           (or (string-match "\\.el$" name)
                               (setq name (concat name ".el")))))
                     (error "Not on an #include line"))))))
-        (or (string-match "\\.[a-zA-Z0-9]+$" name)
+        (or (string-match "\\.[[:alnum:]]+$" name)
             (setq name (concat name ".h")))
         (if (eq punc ?\<)
             (let ((path (or path (PC-include-file-path))))