diff --git a/runtime/syntax/dtrace.vim b/runtime/syntax/dtrace.vim
index 2f2d6e2..392fa1c 100644
--- a/runtime/syntax/dtrace.vim
+++ b/runtime/syntax/dtrace.vim
@@ -10,19 +10,14 @@
 " http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libdtrace/common/dt_lex.l
 " http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libdtrace/common/dt_grammar.y
 
-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
 
 " Read the C syntax to start with
-if version < 600
-  so <sfile>:p:h/c.vim
-else
-  runtime! syntax/c.vim
-  unlet b:current_syntax
-endif
+runtime! syntax/c.vim
+unlet b:current_syntax
 
 syn clear cCommentL  " dtrace doesn't support // style comments