diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index 204a911..d11cb1f 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1,4 +1,4 @@
-*autocmd.txt*   For Vim version 9.1.  Last change: 2025 Apr 21
+*autocmd.txt*   For Vim version 9.1.  Last change: 2025 Jun 19
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -130,6 +130,10 @@
 	:au BufNewFile,BufRead *.html so <sfile>:h/html.vim
 
 Here Vim expands <sfile> to the name of the file containing this line.
+However, <sfile> works differently in a function, in which case it's better to
+use `:execute` with <script> to achieve the same purpose:
+>
+	:exe $'au BufNewFile,BufRead *.html so {expand("<script>:h")}/html.vim'
 
 `:autocmd` adds to the list of autocommands regardless of whether they are
 already present.  When your .vimrc file is sourced twice, the autocommands