diff --git a/plugin/airline.vim b/plugin/airline.vim
index 96348f8d..5ffcfc89 100644
--- a/plugin/airline.vim
+++ b/plugin/airline.vim
@@ -301,7 +301,7 @@ command! AirlineExtensions   call s:airline_extensions()
 
 call airline#init#bootstrap()
 call s:airline_toggle()
-if v:vim_did_enter
+if exists("v:vim_did_enter") && v:vim_did_enter
   call <sid>on_window_changed('VimEnter')
 endif