diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index e64f986..22d5ee6 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -4490,7 +4490,7 @@ function! s:OpenParse(args, wants_cmd) abort
   return [url, pre]
 endfunction
 
-function! s:DiffClose() abort
+function! fugitive#DiffClose() abort
   let mywinnr = winnr()
   for winnr in [winnr('#')] + range(winnr('$'),1,-1)
     if winnr != mywinnr && getwinvar(winnr,'&diff')
@@ -5959,11 +5959,11 @@ function! fugitive#MapJumps(...) abort
       call s:Map('n', 'gO',   ':<C-U>0,4' . blame_map, '<silent>')
       call s:Map('n', 'O',    ':<C-U>0,5' . blame_map, '<silent>')
 
-      call s:Map('n', 'D',  ":<C-U>call <SID>DiffClose()<Bar>Gdiffsplit!<Bar>redraw<Bar>echohl WarningMsg<Bar> echo ':Gstatus D is deprecated in favor of dd'<Bar>echohl NONE<CR>", '<silent>')
-      call s:Map('n', 'dd', ":<C-U>call <SID>DiffClose()<Bar>Gdiffsplit!<CR>", '<silent>')
-      call s:Map('n', 'dh', ":<C-U>call <SID>DiffClose()<Bar>Ghdiffsplit!<CR>", '<silent>')
-      call s:Map('n', 'ds', ":<C-U>call <SID>DiffClose()<Bar>Ghdiffsplit!<CR>", '<silent>')
-      call s:Map('n', 'dv', ":<C-U>call <SID>DiffClose()<Bar>Gvdiffsplit!<CR>", '<silent>')
+      call s:Map('n', 'D',  ":<C-U>call fugitive#DiffClose()<Bar>Gdiffsplit!<Bar>redraw<Bar>echohl WarningMsg<Bar> echo ':Gstatus D is deprecated in favor of dd'<Bar>echohl NONE<CR>", '<silent>')
+      call s:Map('n', 'dd', ":<C-U>call fugitive#DiffClose()<Bar>Gdiffsplit!<CR>", '<silent>')
+      call s:Map('n', 'dh', ":<C-U>call fugitive#DiffClose()<Bar>Ghdiffsplit!<CR>", '<silent>')
+      call s:Map('n', 'ds', ":<C-U>call fugitive#DiffClose()<Bar>Ghdiffsplit!<CR>", '<silent>')
+      call s:Map('n', 'dv', ":<C-U>call fugitive#DiffClose()<Bar>Gvdiffsplit!<CR>", '<silent>')
       call s:Map('n', 'd?', ":<C-U>help fugitive_d<CR>", '<silent>')
 
     else
@@ -6000,7 +6000,7 @@ function! fugitive#MapJumps(...) abort
       call s:Map('nxo', '#', '<SID>PatchSearchExpr(1)', '<expr>')
     endif
     call s:Map('n', 'S',    ':<C-U>echoerr "Use gO"<CR>', '<silent>')
-    call s:Map('n', 'dq', ":<C-U>call <SID>DiffClose()<CR>", '<silent>')
+    call s:Map('n', 'dq', ":<C-U>call fugitive#DiffClose()<CR>", '<silent>')
     call s:Map('n', '-', ":<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>NavigateUp(v:count1))<Bar> if getline(1) =~# '^tree \x\{40,\}$' && empty(getline(2))<Bar>call search('^'.escape(expand('#:t'),'.*[]~\').'/\=$','wc')<Bar>endif<CR>", '<silent>')
     call s:Map('n', 'P',     ":<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit().'^'.v:count1.<SID>Relative(':'))<CR>", '<silent>')
     call s:Map('n', '~',     ":<C-U>exe 'Gedit ' . <SID>fnameescape(<SID>ContainingCommit().'~'.v:count1.<SID>Relative(':'))<CR>", '<silent>')