Emacs C++-mode incorrect indentation?

I have the following in my .emacs file:

(defun my-c++-mode-hook ()
  (setq c-basic-offset 4)
  (c-set-offset 'substatement-open 0))
(add-hook 'c++-mode-hook 'my-c++-mode-hook)

You can determine which offset to edit by hitting [ctrl-c ctrl-s] on any line. On the first line with a brace after the if it will say substatement-open.