diff --git a/autoload/starlark.vim b/autoload/starlark.vim
new file mode 100644
index 0000000..20bcea4
--- /dev/null
+++ b/autoload/starlark.vim
@@ -0,0 +1,45 @@
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! starlark#set_syntax() abort
+  syn case match
+  syn keyword starlarkStatement None True False
+  syn keyword starlarkStatement return break continue lambda
+  syn keyword starlarkConditional if elif else if/end
+  syn keyword starlarkRepeat for while
+  syn keyword starlarkOperator and in not or
+  syn match starlarkType /\<def\>/
+
+  hi def link starlarkStatement Statement
+  hi def link starlarkConditional Conditional
+  hi def link starlarkRepeat Repeat
+  hi def link starlarkOperator Operator
+  hi def link starlarkType Type
+
+  syn keyword starlarkBuitin any all bool chr dict dir enumerate float gatattr hasattr hash int len list max min ord print range repr reversed set sorted str tuple type zip
+  syn keyword starlarkBuitin clear get items keys pop popitem setdefault update values
+  syn keyword starlarkBuitin append clear extend index insert pop remove
+  syn keyword starlarkBuitin union
+  syn keyword starlarkBuitin elem_ords capitalize codepoint_ords count endswith find format index isalpha isdigit islower isspace istitle isupper join lower lstrip partition replace rfind rindex rpartition rsplit rstrip split elems codepoints splitlines startswith strip title upper
+
+  hi def link starlarkBuitin Function
+
+  syn keyword starlarkInclude load
+
+  hi def link starlarkInclude Statement
+
+  syn keyword starlarkTodo contained TODO FIXME NOTE NOTES XXX
+  syn cluster starlarkCommentGroup contains=starlarkTodo
+  syn region starlarkComment start="#" end="$" contains=@starlarkCommentGroup,@Spell
+
+  hi def link starlarkTodo Todo
+  hi def link starlarkComment Comment
+
+  syn region starlarkBlock start="{" end="}" transparent fold
+  syn region starlarkParen start="(" end=")" transparent
+
+  syn sync minlines=500
+endfunction
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
diff --git a/syntax/starlark.vim b/syntax/starlark.vim
index b610388..dfb0e63 100644
--- a/syntax/starlark.vim
+++ b/syntax/starlark.vim
@@ -2,43 +2,7 @@ if exists('b:current_syntax')
   finish
 endif
 
-syn case match
 
-syn keyword starlarkStatement None True False
-syn keyword starlarkStatement return break continue lambda
-syn keyword starlarkConditional if elif else if/end
-syn keyword starlarkRepeat for while
-syn keyword starlarkOperator and in not or
-syn match starlarkType /\<def\>/
-
-hi def link starlarkStatement Statement
-hi def link starlarkConditional Conditional
-hi def link starlarkRepeat Repeat
-hi def link starlarkOperator Operator
-hi def link starlarkType Type
-
-syn keyword starlarkBuitin any all bool chr dict dir enumerate float gatattr hasattr hash int len list max min ord print range repr reversed set sorted str tuple type zip
-syn keyword starlarkBuitin clear get items keys pop popitem setdefault update values
-syn keyword starlarkBuitin append clear extend index insert pop remove
-syn keyword starlarkBuitin union
-syn keyword starlarkBuitin elem_ords capitalize codepoint_ords count endswith find format index isalpha isdigit islower isspace istitle isupper join lower lstrip partition replace rfind rindex rpartition rsplit rstrip split elems codepoints splitlines startswith strip title upper
-
-hi def link starlarkBuitin Function
-
-syn keyword starlarkInclude load
-
-hi def link starlarkInclude Statement
-
-syn keyword starlarkTodo contained TODO FIXME NOTE NOTES XXX
-syn cluster starlarkCommentGroup contains=starlarkTodo
-syn region starlarkComment start="#" end="$" contains=@starlarkCommentGroup,@Spell
-
-hi def link starlarkTodo Todo
-hi def link starlarkComment Comment
-
-syn region starlarkBlock start="{" end="}" transparent fold
-syn region starlarkParen start="(" end=")" transparent
-
-syn sync minlines=500
+call starlark#set_syntax()
 
 let b:current_syntax = 'starlark'