diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 2a008cb50e..893217d8ea 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1436,6 +1436,10 @@ You can also disable this rendering by adding the following line to your
 vimrc file: >
 	:let html_no_rendering=1
 
+By default Vim synchronises the syntax to 250 lines before the first displayed
+line.  This can be configured using: >
+	:let html_minlines = 500
+<
 HTML comments are rather special (see an HTML reference document for the
 details), and the syntax coloring scheme will highlight all errors.
 However, if you prefer to use the wrong style (starts with <!-- and
diff --git a/runtime/syntax/html.vim b/runtime/syntax/html.vim
index d067dde83c..ca7c7f1cdd 100644
--- a/runtime/syntax/html.vim
+++ b/runtime/syntax/html.vim
@@ -4,6 +4,7 @@
 " Previous Maintainers: Jorge Maldonado Ventura <jorgesumle@freakspot.net>
 "			Claudio Fleiner <claudio@fleiner.com>
 " Last Change:		2023 Nov 28
+" 2024 Jul 30 by Vim Project: increase syn-sync-minlines to 250
 
 " See :help html.vim for some comments and a description of the options
 
@@ -320,7 +321,7 @@ if main_syntax == "html"
   syn sync match htmlHighlight groupthere NONE "<[/a-zA-Z]"
   syn sync match htmlHighlight groupthere javaScript "<script"
   syn sync match htmlHighlightSkip "^.*['\"].*$"
-  syn sync minlines=10
+  exe "syn sync minlines=" . get(g:, 'html_minlines', 250)
 endif
 
 " Folding