diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 1a07df3..9f63a33 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -2628,8 +2628,9 @@ function! s:Do(action, visual) abort
   return ''
 endfunction
 
-function! s:StageReveal(...) abort
-  let begin = a:0 ? a:1 : line('.')
+function! s:StageReveal() abort
+  exe 'normal! zv'
+  let begin = line('.')
   if getline(begin) =~# '^@'
     let end = begin + 1
     while getline(end) =~# '^[ \+-]'