diff --git a/runtime/syntax/m4.vim b/runtime/syntax/m4.vim
index 8325405..6f229ea 100644
--- a/runtime/syntax/m4.vim
+++ b/runtime/syntax/m4.vim
@@ -37,21 +37,19 @@
 
 " Define the default highlighting.
 " Only when an item doesn't have highlighting yet
-command -nargs=+ HiLink hi def link <args>
-HiLink m4Delimiter Delimiter
-HiLink m4Comment   Comment
-HiLink m4Function  Function
-HiLink m4Keyword   Keyword
-HiLink m4Special   Special
-HiLink m4String    String
-HiLink m4Statement Statement
-HiLink m4Preproc   PreProc
-HiLink m4Type      Type
-HiLink m4Special   Special
-HiLink m4Variable  Special
-HiLink m4Constants Constant
-HiLink m4Builtin   Statement
-delcommand HiLink
+hi def link m4Delimiter Delimiter
+hi def link m4Comment   Comment
+hi def link m4Function  Function
+hi def link m4Keyword   Keyword
+hi def link m4Special   Special
+hi def link m4String    String
+hi def link m4Statement Statement
+hi def link m4Preproc   PreProc
+hi def link m4Type      Type
+hi def link m4Special   Special
+hi def link m4Variable  Special
+hi def link m4Constants Constant
+hi def link m4Builtin   Statement
 
 let b:current_syntax = "m4"