diff --git a/README.md b/README.md
index fe93e5c2..f44dd2a6 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ nnoremap <silent> <Leader>b :<C-u>FzfPreviewBuffers -processors=g:fzf_preview_bu
 "
 
 " Example: Exclude filename with FzfPreviewProjectGrep
-AutoCmd VimEnter * let g:fzf_preview_grep_command_options = fzf_preview#command#get_common_command_options() |
+autocmd VimEnter * let g:fzf_preview_grep_command_options = fzf_preview#command#get_common_command_options() |
   \ let g:fzf_preview_grep_command_options = g:fzf_preview_grep_command_options . ' --nth=3'
 nnoremap <Leader>g :<C-u>FzfPreviewProjectGrep -fzf-args=g:fzf_preview_grep_command_options<Space>
 ```
diff --git a/doc/fzf_preview_vim.txt b/doc/fzf_preview_vim.txt
index 8e218c8a..59809bfb 100644
--- a/doc/fzf_preview_vim.txt
+++ b/doc/fzf_preview_vim.txt
@@ -217,7 +217,7 @@ EXPERIMENTAL: Specifications may change.
 
     Usage example: Exclude filename with FzfPreviewProjectGrep
 >
-    AutoCmd VimEnter * let g:fzf_preview_grep_command_options = fzf_preview#command#get_common_command_options() |
+    autocmd VimEnter * let g:fzf_preview_grep_command_options = fzf_preview#command#get_common_command_options() |
       \ let g:fzf_preview_grep_command_options = g:fzf_preview_grep_command_options . ' --nth=3'
     nnoremap <Leader>g :<C-u>FzfPreviewProjectGrep -fzf-args=g:fzf_preview_grep_command_options<Space>
 <