diff --git a/runtime/ftplugin/help.vim b/runtime/ftplugin/help.vim
index c94b2ef3eb..9d2361b413 100644
--- a/runtime/ftplugin/help.vim
+++ b/runtime/ftplugin/help.vim
@@ -11,13 +11,16 @@ let b:did_ftplugin = 1
 let s:cpo_save = &cpo
 set cpo&vim
 
-let b:undo_ftplugin = "setl fo< tw< cole< cocu<"
+let b:undo_ftplugin = "setl fo< tw< cole< cocu< keywordprg<"
 
 setlocal formatoptions+=tcroql textwidth=78
 if has("conceal")
   setlocal cole=2 cocu=nc
 endif
 
+" Prefer Vim help instead of manpages.
+setlocal keywordprg=:help
+
 if !exists('g:no_plugin_maps')
   function! s:show_toc() abort
     let bufname = bufname('%')
diff --git a/runtime/ftplugin/vim.vim b/runtime/ftplugin/vim.vim
index f355d2837d..ba9ed76169 100644
--- a/runtime/ftplugin/vim.vim
+++ b/runtime/ftplugin/vim.vim
@@ -14,7 +14,7 @@ let b:did_ftplugin = 1
 let s:cpo_save = &cpo
 set cpo-=C
 
-let b:undo_ftplugin = "setl fo< isk< com< tw< commentstring<"
+let b:undo_ftplugin = "setl fo< isk< com< tw< commentstring< keywordprg<"
 	\ . "| unlet! b:match_ignorecase b:match_words b:match_skip"
 
 " Set 'formatoptions' to break comment lines but not other lines,
@@ -36,6 +36,9 @@ endif
 " Comments start with a double quote
 setlocal commentstring=\"%s
 
+" Prefer Vim help instead of manpages.
+setlocal keywordprg=:help
+
 " Move around functions.
 nnoremap <silent><buffer> [[ m':call search('^\s*fu\%[nction]\>', "bW")<CR>
 vnoremap <silent><buffer> [[ m':<C-U>exe "normal! gv"<Bar>call search('^\s*fu\%[nction]\>', "bW")<CR>