diff --git a/runtime/syntax/yacc.vim b/runtime/syntax/yacc.vim
index aef02b5..d4bd019 100644
--- a/runtime/syntax/yacc.vim
+++ b/runtime/syntax/yacc.vim
@@ -1,14 +1,17 @@
 " Vim syntax file
 " Language:	Yacc
-" Maintainer:	Dr. Charles E. Campbell, Jr. <NdrOchipS@PcampbellAfamily.Mbiz>
-" Last Change:	Feb 22, 2006
-" Version:	4
+" Maintainer:	Charles E. Campbell, Jr. <NdrOchipS@PcampbellAfamily.Mbiz>
+" Last Change:	Jan 09, 2008
+" Version:	5
 " URL:	http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
 "
-" Option:
+" Options: {{{1
 "   g:yacc_uses_cpp : if this variable exists, then C++ is loaded rather than C
+"   g:yacc_minlines : see :help :he syn-sync-minlines -- default 50
+"   g:yacc_maxlines : see :help :he syn-sync-maxlines -- default 200
 
-" For version 5.x: Clear all syntax items
+" ---------------------------------------------------------------------
+" For version 5.x: Clear all syntax items {{{1
 " For version 6.x: Quit when a syntax file was already loaded
 if version < 600
   syntax clear
@@ -16,7 +19,8 @@
   finish
 endif
 
-" Read the C syntax to start with
+" ---------------------------------------------------------------------
+" Read the C syntax to start with {{{1
 if version >= 600
   if exists("g:yacc_uses_cpp")
     runtime! syntax/cpp.vim
@@ -29,11 +33,13 @@
   so <sfile>:p:h/c.vim
 endif
 
-" Clusters
+" ---------------------------------------------------------------------
+" Clusters {{{1
 syn cluster	yaccActionGroup	contains=yaccDelim,cInParen,cTodo,cIncluded,yaccDelim,yaccCurlyError,yaccUnionCurly,yaccUnion,cUserLabel,cOctalZero,cCppOut2,cCppSkip,cErrInBracket,cErrInParen,cOctalError,cCommentStartError,cParenError
 syn cluster	yaccUnionGroup	contains=yaccKey,cComment,yaccCurly,cType,cStructure,cStorageClass,yaccUnionCurly
 
-" Yacc stuff
+" ---------------------------------------------------------------------
+" Yacc stuff {{{1
 syn match	yaccDelim	"^\s*[:|;]"
 syn match	yaccOper	"@\d\+"
 
@@ -49,17 +55,32 @@
 syn match	yaccType	"<[a-zA-Z_][a-zA-Z0-9_]*>"	contains=yaccBrkt
 syn match	yaccDefinition	"^[A-Za-z][A-Za-z0-9_]*\_s*:"
 
-" special Yacc separators
+" ---------------------------------------------------------------------
+" special Yacc separators {{{1
 syn match	yaccSectionSep	"^[ \t]*%%"
 syn match	yaccSep	"^[ \t]*%{"
 syn match	yaccSep	"^[ \t]*%}"
 
-" I'd really like to highlight just the outer {}.  Any suggestions???
+" ---------------------------------------------------------------------
+" I'd really like to highlight just the outer {}.  Any suggestions??? {{{1
 syn match	yaccCurlyError	"[{}]"
 syn region	yaccAction	matchgroup=yaccCurly start="{" end="}" contains=ALLBUT,@yaccActionGroup
 
+" ---------------------------------------------------------------------
+" Yacc synchronization: {{{1
+if exists("g:yacc_maxlines")
+ exe "syn sync maxlines=".g:yacc_maxlines
+else
+ syn sync maxlines=200
+endif
+if exists("g:yacc_minlines")
+ exe "syn sync minlines=".g:yacc_minlines
+else
+ syn sync minlines=50
+endif
 
-" Define the default highlighting.
+" ---------------------------------------------------------------------
+" Define the default highlighting. {{{1
 " For version 5.7 and earlier: only when not done already
 " For version 5.8 and later: only when an item doesn't have highlighting yet
 if version >= 508 || !exists("did_yacc_syn_inits")
@@ -70,13 +91,13 @@
     command -nargs=+ HiLink hi def link <args>
   endif
 
-  " Internal yacc highlighting links
+  " Internal yacc highlighting links {{{2
   HiLink yaccBrkt	yaccStmt
   HiLink yaccKey	yaccStmt
   HiLink yaccOper	yaccStmt
   HiLink yaccUnionStart	yaccKey
 
-  " External yacc highlighting links
+  " External yacc highlighting links {{{2
   HiLink yaccCurly	Delimiter
   HiLink yaccCurlyError	Error
   HiLink yaccDefinition	Function
@@ -87,12 +108,13 @@
   HiLink yaccStmt	Statement
   HiLink yaccType	Type
 
-  " since Bram doesn't like my Delimiter :|
+  " since Bram doesn't like my Delimiter :| {{{2
   HiLink Delimiter	Type
 
   delcommand HiLink
 endif
-
 let b:current_syntax = "yacc"
 
-" vim: ts=15
+" ---------------------------------------------------------------------
+"  Modelines: {{{1
+" vim: ts=15 fdm=marker