diff --git a/plugins.vim b/plugins.vim
index 1cd0569..b6a78cc 100644
--- a/plugins.vim
+++ b/plugins.vim
@@ -880,7 +880,7 @@ noremap <silent> <ScrollWheelUp>   :call comfortable_motion#flick(-20)<CR>
 """""""""""""""""""""""""" asyncrun.vim settings """"""""""""""""""""""""""
 " Automatically open quickfix window of 6 line tall after asyncrun starts
 let g:asyncrun_open = 6
-if has('win32')
+if g:is_win
   " Command output encoding for Windows
   let g:asyncrun_encs = 'gbk'
 endif