diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 6b38b8c..00d01bc 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 8.2.  Last change: 2020 Aug 15
+*syntax.txt*	For Vim version 8.2.  Last change: 2020 Nov 22
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -5305,6 +5305,12 @@
 Without the "default" in the C syntax file, the highlighting would be
 overruled when the syntax file is loaded.
 
+To have a link survive `:highlight clear`, which is useful if you have
+highlighting for a specific filetype and you want to keep it when selecting
+another color scheme, put a command like this in the
+"after/syntax/{filetype}.vim" file: >
+    highlight! default link cComment Question
+
 ==============================================================================
 15. Cleaning up						*:syn-clear* *E391*