diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index cb6704c..d8c4b08 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2025 Feb 20
+*syntax.txt*	For Vim version 9.1.  Last change: 2025 Feb 23
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5432,6 +5432,10 @@
 			See |:highlight-default| for the optional [default]
 			argument.
 
+:hi[ghlight][!] [default] link {from-group} {to-group}
+:hi[ghlight][!] [default] link {from-group} NONE
+			See |:hi-link|.
+
 Normally a highlight group is added once when starting up.  This sets the
 default values for the highlighting.  After that, you can use additional
 highlight commands to change the arguments that you want to set to non-default