diff --git a/after/syntax/css/values-5.vim b/after/syntax/css/values-5.vim
index 6efee8d..46052b8 100644
--- a/after/syntax/css/values-5.vim
+++ b/after/syntax/css/values-5.vim
@@ -1,3 +1,3 @@
 syn keyword cssFontProp contained interpolate-size
 syn keyword cssFontAttr contained numeric-only allow-keyword
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(\(\(media\|container\)-\)\=progress\|\(\(calc\|transform\)-\)\=mix\|cross-fade\|first-valid\|toggle\|random\(-item\)\=\|sibling-\(count\|index\)\|calc-size\)\s*(" end=")" oneline keepend
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(\(\(media\|container\)-\)\=progress\|\(\(calc\|transform\)-\)\=mix\|cross-fade\|first-valid\|toggle\|if\|inherit\|random\(-item\)\=\|sibling-\(count\|index\)\|calc-size\)\s*(" end=")" oneline keepend
diff --git a/test/test.css b/test/test.css
index fa7b5e2..5298992 100644
--- a/test/test.css
+++ b/test/test.css
@@ -1383,6 +1383,8 @@ view {
   display: cross-fade(15%, url(foo.png), white);
   display: toggle(italic, normal);
   display: first-valid(center, none, 1px);
+  display: if(media(screen): red; else: auto);
+  display: inherit(--foo, auto);
   display: random(1, 10, by 1);
   display: random-item(--x, red, yellow, green);
   display: sibling-count();