diff --git a/after/syntax/css/env-1.vim b/after/syntax/css/env-1.vim
new file mode 100644
index 0000000..27443c6
--- /dev/null
+++ b/after/syntax/css/env-1.vim
@@ -0,0 +1 @@
+syn region cssFunction contained matchgroup=cssFunctionName start="\<env\s*(" end=")" oneline contains=cssValueInteger,cssValueNumber,cssValueLength,cssFunctionComma
diff --git a/test/test.css b/test/test.css
index f7f0945..73c3cdf 100644
--- a/test/test.css
+++ b/test/test.css
@@ -391,6 +391,10 @@
   display: linear(0, 0.25, 1);
 }
 
+.env-1 {
+  display: env(foo, red, blue);
+}
+
 .exclusions-3 {
   wrap-flow: auto;
   wrap-through: auto;