diff --git a/syntax/ats.vim b/syntax/ats.vim
index f4cd8c2..83735e9 100644
--- a/syntax/ats.vim
+++ b/syntax/ats.vim
@@ -61,8 +61,8 @@ endif
 "
 
 " keyword highlighting
-syn keyword atsKeyword prefix postfix infix infixl infixr op nonfix
-syn keyword atsKeyword staload stadef sta dynload stacst
+syn keyword atsKeyword prefix postfix infix infixl infixr op nonfix addr
+syn keyword atsKeyword staload stadef sta dynload stacst assertloc
 syn keyword atsCond if then else case sif
 syn keyword atsRepeat while
 syn keyword atsException exception raise try
diff --git a/syntax_checkers/ats/patscc.vim b/syntax_checkers/ats/patscc.vim
index 2c4e0fe..2924553 100644
--- a/syntax_checkers/ats/patscc.vim
+++ b/syntax_checkers/ats/patscc.vim
@@ -5,6 +5,7 @@ let g:loaded_syntastic_ats_patscc_checker = 1
 
 let g:syntastic_ats_patscc_exec = 'patscc'
 
+" TODO optionally include -ccats flag for quicker response
 function! SyntaxCheckers_ats_patscc_GetLocList() dict
     let makeprg = self.makeprgBuild({
                 \ 'exe': self.getExec(),