--- html-helper-mode.el.orig	2014-11-03 21:30:41.583057674 +0900
+++ html-helper-mode.el	2014-11-03 21:37:22.587067537 +0900
@@ -2424,7 +2424,7 @@
 
 (condition-case nil
     (cond
-     ((or (boundp css-mode-hook) css-mode-hook)
+     ((or (boundp 'css-mode-hook) css-mode-hook)
       (add-hook 'css-mode-hook 'html-script-release-setup))
      (t (setq css-mode-hook 'html-script-release-setup)))
   (error (setq css-mode-hook 'html-script-release-setup)))