diff --git a/zencoding.vim b/zencoding.vim
index 9767c4c..5afebdb 100644
--- a/zencoding.vim
+++ b/zencoding.vim
@@ -981,6 +981,7 @@ endfunction
 
 function! s:zen_expand(word)
   let type = &ft
+  if len(type) == 0 | let type = 'html' | endif
   let line = getline('.')[:col('.')-1]
   if a:word || type != 'html'
     let part = matchstr(line, '\([0-9A-Za-z_\@:]\+\)$')
diff --git a/zencoding.vim.vimup b/zencoding.vim.vimup
index 2f2c3c3..5dda3cb 100644
--- a/zencoding.vim.vimup
+++ b/zencoding.vim.vimup
@@ -2,7 +2,7 @@ script_name: ZenCoding.vim
 script_id: '2981'
 script_type: utility
 script_package: zencoding.vim
-script_version: '0.14'
+script_version: '0.15'
 required_vim_version: '7.0'
 summary: vim plugins for HTML and CSS hi-speed coding.
 
@@ -67,6 +67,8 @@ install_details: |
   copy zencoding.vim to your plugin directory.
 
 versions:
+- '0.15': |
+   This is an upgrade for ZenCoding.vim: set default filetype to 'html'.
 - '0.14': |
    This is an upgrade for ZenCoding.vim: fixed tag name like 'fs:n' in 'css'.
 - '0.14': |