diff --git a/doc/airline.txt b/doc/airline.txt
index be8f7e12..a962aca2 100644
--- a/doc/airline.txt
+++ b/doc/airline.txt
@@ -178,8 +178,8 @@ values):
 * if you want to update your highlights without affecting the airline theme,
   you can do so using the AirlineAfterTheme autocmd. >
   function! s:update_highlights()
-    hi CursorLine ctermbg=none guibg=none
-    hi VertSplit ctermbg=none guibg=none
+    hi CursorLine ctermbg=none guibg=NONE
+    hi VertSplit ctermbg=none guibg=NONE
   endfunction
   autocmd User AirlineAfterTheme call s:update_highlights()
 <