diff --git a/autoload/gitgutter/utility.vim b/autoload/gitgutter/utility.vim
index d83f63f..1d89a77 100644
--- a/autoload/gitgutter/utility.vim
+++ b/autoload/gitgutter/utility.vim
@@ -26,17 +26,17 @@ endfunction
 function! gitgutter#utility#is_active()
   return g:gitgutter_enabled &&
         \ !pumvisible() &&
+        \ gitgutter#utility#is_file_buffer() &&
         \ gitgutter#utility#exists_file() &&
-        \ gitgutter#utility#not_git_dir() &&
-        \ !gitgutter#utility#help_file()
+        \ gitgutter#utility#not_git_dir()
 endfunction
 
 function! gitgutter#utility#not_git_dir()
   return gitgutter#utility#full_path_to_directory_of_file() !~ '[/\\]\.git\($\|[/\\]\)'
 endfunction
 
-function! gitgutter#utility#help_file()
-  return getbufvar(s:bufnr, '&filetype') ==# 'help' && getbufvar(s:bufnr, '&buftype') ==# 'help'
+function! gitgutter#utility#is_file_buffer()
+  return empty(getbufvar(s:bufnr, '&buftype'))
 endfunction
 
 " A replacement for the built-in `shellescape(arg)`.