diff --git a/plugin/syntastic.vim b/plugin/syntastic.vim
index a6cb8ab1..db09b4af 100644
--- a/plugin/syntastic.vim
+++ b/plugin/syntastic.vim
@@ -19,7 +19,7 @@ if has('reltime')
     lockvar! g:_SYNTASTIC_START
 endif
 
-let g:_SYNTASTIC_VERSION = '3.8.0-38'
+let g:_SYNTASTIC_VERSION = '3.8.0-39'
 lockvar g:_SYNTASTIC_VERSION
 
 " Sanity checks {{{1
diff --git a/syntax_checkers/dart/dartanalyzer.vim b/syntax_checkers/dart/dartanalyzer.vim
index 63b8267b..7afc5e55 100644
--- a/syntax_checkers/dart/dartanalyzer.vim
+++ b/syntax_checkers/dart/dartanalyzer.vim
@@ -30,7 +30,10 @@ function! SyntaxCheckers_dart_dartanalyzer_GetHighlightRegex(error)
 endfunction
 
 function! SyntaxCheckers_dart_dartanalyzer_GetLocList() dict
-    let makeprg = self.makeprgBuild({ 'args_after': '--machine' })
+    if !exists('s:format_machine')
+        let s:format_machine = syntastic#util#versionIsAtLeast(self.getVersion(), [1, 23]) ? '--format=machine' : '--machine'
+    endif
+    let makeprg = self.makeprgBuild({ 'args_after': s:format_machine })
 
     " Machine readable format looks like:
     " SEVERITY|TYPE|ERROR_CODE|FILENAME|LINE_NUMBER|COLUMN|LENGTH|MESSAGE