Setting input method of Emacs on launch

I have set my default-input-method variable to "english-dvorak":

(custom-set-variables
    '(default开发者_JAVA百科-input-method "english-dvorak"))

When I launch Emacs, this input method is not selected. How can I make it so that all buffers by default open in this input method?

(defadvice switch-to-buffer (after activate-input-method activate)
  (activate-input-method "english-dvorak"))