diff --git a/runtime/syntax/gretl.vim b/runtime/syntax/gretl.vim
index 37299b8..40eb544 100644
--- a/runtime/syntax/gretl.vim
+++ b/runtime/syntax/gretl.vim
@@ -4,20 +4,13 @@
 " Last Change:  2006 Apr 30
 " Filenames:	*.inp *.gretl
 " URL:	http://uosis.mif.vu.lt/~zemlys/vim-syntax/gretl.vim
-" For version 5.x: Clear all syntax items
-" For version 6.x: Quit when a syntax file was already loaded
 
-if version < 600
-  syntax clear
-elseif exists("b:current_syntax")
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
   finish
 endif
 
-if version >= 600
-  setlocal iskeyword=@,48-57,_,.
-else
-  set iskeyword=@,48-57,_,.
-endif
+setlocal iskeyword=@,48-57,_,.
 
 syn case match
 
@@ -68,34 +61,26 @@
 syn region gBlockComment matchgroup=gCommentStart start="(\*" end="\*)"
 
 " Define the default highlighting.
-" 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_r_syn_inits")
-  if version < 508
-    let did_r_syn_inits = 1
-    command -nargs=+ HiLink hi link <args>
-  else
-    command -nargs=+ HiLink hi def link <args>
-  endif
-  HiLink gComment      Comment
-  HiLink gCommentStart Comment
-  HiLink gBlockComment Comment
-  HiLink gString       String
-  HiLink gNumber       Number
-  HiLink gBoolean      Boolean
-  HiLink gFloat        Float
-  HiLink gCommands     Repeat	
-  HiLink gGenrFunc     Type
-  HiLink gDelimiter    Delimiter
-  HiLink gError        Error
-  HiLink gBraceError   Error
-  HiLink gCurlyError   Error
-  HiLink gParenError   Error
-  HiLink gIdentifier   Normal
-  HiLink gVariable     Identifier
-  HiLink gArrow	       Repeat
-  delcommand HiLink
-endif
+" Only when an item doesn't have highlighting yet
+command -nargs=+ HiLink hi def link <args>
+HiLink gComment      Comment
+HiLink gCommentStart Comment
+HiLink gBlockComment Comment
+HiLink gString       String
+HiLink gNumber       Number
+HiLink gBoolean      Boolean
+HiLink gFloat        Float
+HiLink gCommands     Repeat	
+HiLink gGenrFunc     Type
+HiLink gDelimiter    Delimiter
+HiLink gError        Error
+HiLink gBraceError   Error
+HiLink gCurlyError   Error
+HiLink gParenError   Error
+HiLink gIdentifier   Normal
+HiLink gVariable     Identifier
+HiLink gArrow	       Repeat
+delcommand HiLink
 
 let b:current_syntax="gretl"