diff --git a/runtime/doc/usr_51.txt b/runtime/doc/usr_51.txt
index f2b5e13..b0bf792 100644
--- a/runtime/doc/usr_51.txt
+++ b/runtime/doc/usr_51.txt
@@ -1,4 +1,4 @@
-*usr_51.txt*	For Vim version 9.1.  Last change: 2022 Jun 03
+*usr_51.txt*	For Vim version 9.1.  Last change: 2024 Apr 04
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -649,13 +649,9 @@
 make the default file skip the settings.
 							*:CompilerSet*
 The second mechanism is to use ":set" for ":compiler!" and ":setlocal" for
-":compiler".  Vim defines the ":CompilerSet" user command for this.  However,
-older Vim versions don't, thus your plugin should define it then.  This is an
-example: >
+":compiler".  Vim defines the ":CompilerSet" user command for this.  This is
+an example: >
 
-  if exists(":CompilerSet") != 2
-    command -nargs=* CompilerSet setlocal <args>
-  endif
   CompilerSet errorformat&		" use the default 'errorformat'
   CompilerSet makeprg=nmake