diff --git a/syntax/ats.vim b/syntax/ats.vim
index e2adf92..f246e1a 100644
--- a/syntax/ats.vim
+++ b/syntax/ats.vim
@@ -32,7 +32,7 @@ syn match atsArrow '=/=>'
 syn region atsArrow start="=<" end=">" contains=arrowContents
 syn region atsArrow start="-<" end=">"
 
-syn keyword atsType void bool string char int uint charNZ strnptr Strptr0 Strptr1 nat lint ulint
+syn keyword atsType void bool string char int uint charNZ strnptr Strptr0 Strptr1 nat lint ulint double float
 syn keyword atsType datavtype datatype vtypedef dataviewtype viewtypdef typedef view viewdef dataview abstype absvtype absviewtype datasort dataprop
 syn keyword atsType implement primplmnt extern