diff --git a/syntax/sass.vim b/syntax/sass.vim
index cbcfb9b..5ecd802 100644
--- a/syntax/sass.vim
+++ b/syntax/sass.vim
@@ -58,6 +58,7 @@ syn match sassAmpersand  "&"
 " TODO: Arithmetic (including strings and concatenation)
 
 syn region sassMediaQuery matchgroup=sassMedia start="@media" end="[{};]\@=\|$" contains=sassMediaOperators
+syn region sassKeyframe matchgroup=cssAtKeyword start=/@\(-[a-z]\+-\)\=keyframes\>/ end=";\|$" contains=cssVendor,cssComment nextgroup=cssDefinition
 syn keyword sassMediaOperators and not only contained
 syn region sassCharset start="@charset" end=";\|$" contains=scssComment,cssStringQ,cssStringQQ,cssURL,cssUnicodeEscape,cssMediaType
 syn region sassInclude start="@import" end=";\|$" contains=scssComment,cssStringQ,cssStringQQ,cssURL,cssUnicodeEscape,cssMediaType