diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index a44b6f6..fe6865e 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 Mar 15
+*syntax.txt*	For Vim version 9.1.  Last change: 2025 Mar 21
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -3512,25 +3512,25 @@
 /bin/sh  /bin/ksh  /bin/bash).  If the first line specifies a shelltype, then
 that shelltype is used.  However some files (ex. .profile) are known to be
 shell files but the type is not apparent.  Furthermore, on many systems sh is
-symbolically linked to "bash" (Linux, Windows+cygwin) or "ksh" (Posix).
+symbolically linked to "bash" (Linux, Windows+cygwin) or "ksh" (POSIX).
 
 One may specify a global default by instantiating one of the following
 variables in your <.vimrc>:
 
    ksh: >
 	let g:is_kornshell = 1
-<   posix:  (using this is nearly the same as setting g:is_kornshell to 1) >
+<   posix: (default) >
 	let g:is_posix     = 1
 <   bash: >
 	let g:is_bash	   = 1
-<   sh: (default) Bourne shell >
+<   dash: >
+	let g:is_dash	   = 1
+<   sh: Bourne shell >
 	let g:is_sh	   = 1
 
-<   (dash users should use posix)
-
 If there's no "#! ..." line, and the user hasn't availed himself/herself of a
 default sh.vim syntax setting as just shown, then syntax/sh.vim will assume
-the Bourne shell syntax.  No need to quote RFCs or market penetration
+the POSIX shell syntax.  No need to quote RFCs or market penetration
 statistics in error reports, please -- just select the default version of the
 sh your system uses and install the associated "let..." in your <.vimrc>.