diff --git a/autoload/airline/init.vim b/autoload/airline/init.vim
index 1ad8bbad..b563581c 100644
--- a/autoload/airline/init.vim
+++ b/autoload/airline/init.vim
@@ -7,7 +7,10 @@ function! s:check_defined(variable, default)
   endif
 endfunction
 
+let s:loaded = 0
 function! airline#init#bootstrap()
+  if s:loaded | return | endif | let s:loaded = 1
+
   call s:check_defined('g:airline_left_sep', get(g:, 'airline_powerline_fonts', 0)?"":">")
   call s:check_defined('g:airline_left_alt_sep', get(g:, 'airline_powerline_fonts', 0)?"":">")
   call s:check_defined('g:airline_right_sep', get(g:, 'airline_powerline_fonts', 0)?"":"<")