diff --git a/autoload/airline/extensions/wordcount.vim b/autoload/airline/extensions/wordcount.vim
index 4bb2563..e424f5e 100644
--- a/autoload/airline/extensions/wordcount.vim
+++ b/autoload/airline/extensions/wordcount.vim
@@ -16,11 +16,13 @@ function! s:update()
     else
       if get(b:, 'airline_wordcount_cache', '') is# '' ||
             \ b:airline_wordcount_cache isnot# get(b:, 'airline_wordcount', '') ||
-            \ get(b:, 'airline_change_tick', 0) != b:changedtick
+            \ get(b:, 'airline_change_tick', 0) != b:changedtick || 
+            \ get(b:, 'airline_winwidth', 0) != winwidth(0)
         " cache data
         let b:airline_wordcount = airline#extensions#wordcount#formatters#{s:formatter}#format()
         let b:airline_wordcount_cache = b:airline_wordcount
         let b:airline_change_tick = b:changedtick
+        let b:airline_winwidth = winwidth(0)
       endif
     endif
   endif