diff --git a/syntax_checkers/ats/patscc.vim b/syntax_checkers/ats/patscc.vim
index eb49b30..bd165bf 100644
--- a/syntax_checkers/ats/patscc.vim
+++ b/syntax_checkers/ats/patscc.vim
@@ -8,7 +8,7 @@ let g:syntastic_ats_patscc_exec = 'patscc'
 function! SyntaxCheckers_ats_patscc_GetLocList() dict
     let makeprg = self.makeprgBuild({
                 \ 'exe': self.getExec(),
-                \ 'args': '-DATS_MEMALLOC_LIBC',
+                \ 'args': '-DATS_MEMALLOC_LIBC -cleanaft',
                 \ 'fname': shellescape(expand('%') )})
 
     let errorformat = '%f:%m'
@@ -18,6 +18,8 @@ function! SyntaxCheckers_ats_patscc_GetLocList() dict
             \ 'errorformat': errorformat })
     return loclist
 
+    exec 'silent !rm -f a.out'
+
 endfunction
 
 call g:SyntasticRegistry.CreateAndRegisterChecker({