diff --git a/plugin/lightline.vim b/plugin/lightline.vim
index a7738a8..43d3176 100644
--- a/plugin/lightline.vim
+++ b/plugin/lightline.vim
@@ -3,9 +3,13 @@
 " Version: 0.0
 " Author: itchyny
 " License: MIT License
-" Last Change: 2013/08/23 14:19:14.
+" Last Change: 2013/08/23 14:27:31.
 " =============================================================================
 
+if exists('g:loaded_lightline') && g:loaded_lightline
+  finish
+endif
+
 let s:save_cpo = &cpo
 set cpo&vim
 
@@ -16,5 +20,7 @@ augroup LightLine
   autocmd CursorMoved,FileType,BufUnload * call lightline#update_once()
 augroup END
 
+let g:loaded_lightline = 1
+
 let &cpo = s:save_cpo
 unlet s:save_cpo