diff --git a/runtime/syntax/yacc.vim b/runtime/syntax/yacc.vim
index 8736baf..01e342e 100644
--- a/runtime/syntax/yacc.vim
+++ b/runtime/syntax/yacc.vim
@@ -1,9 +1,9 @@
 " Vim syntax file
 " Language:	Yacc
 " Maintainer:	Charles E. Campbell <NdrOchipS@PcampbellAfamily.Mbiz>
-" Last Change:	Apr 02, 2015
-" Version:	13
-" URL:	http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
+" Last Change:	Aug 31, 2016
+" Version:	15
+" URL:	http://www.drchip.org/astronaut/vim/index.html#SYNTAX_YACC
 "
 " Options: {{{1
 "   g:yacc_uses_cpp : if this variable exists, then C++ is loaded rather than C
@@ -87,7 +87,7 @@
 
 " ---------------------------------------------------------------------
 " Define the default highlighting. {{{1
-if !exists("did_yacc_syn_inits")
+if !exists("skip_yacc_syn_inits")
   hi def link yaccBrkt	yaccStmt
   hi def link yaccComment	Comment
   hi def link yaccCurly	Delimiter