diff --git a/after/syntax/css/css-style-attr.vim b/after/syntax/css/css-style-attr.vim
new file mode 100644
index 0000000..dd72adc
--- /dev/null
+++ b/after/syntax/css/css-style-attr.vim
@@ -0,0 +1 @@
+" N/A
diff --git a/after/syntax/html.vim b/after/syntax/html.vim
index 63ffc79..9361720 100644
--- a/after/syntax/html.vim
+++ b/after/syntax/html.vim
@@ -32,6 +32,7 @@ syn include @htmlCss syntax/css/css-scoping-1.vim
 syn include @htmlCss syntax/css/css-scroll-snap-1.vim
 syn include @htmlCss syntax/css/css-shapes-1.vim
 syn include @htmlCss syntax/css/css-sizing-3.vim
+syn include @htmlCss syntax/css/css-style-attr.vim
 syn include @htmlCss syntax/css/css-syntax-3.vim
 syn include @htmlCss syntax/css/css-text-3.vim
 syn include @htmlCss syntax/css/css-text-4.vim
diff --git a/test/test.css b/test/test.css
index 4d706c0..20fbfe8 100644
--- a/test/test.css
+++ b/test/test.css
@@ -603,6 +603,10 @@
   display: reduced;
 }
 
+.style-attr {
+  display: auto;
+}
+
 .syntax-3 {
   display: auto;
 }
diff --git a/test/test.html b/test/test.html
index 346c470..2420627 100644
--- a/test/test.html
+++ b/test/test.html
@@ -664,6 +664,11 @@
   display: reduced;
 }
 </style>
+<style style="display: auto">
+.style-attr {
+  display: auto;
+}
+</style>
 <style>
 .syntax-3 {
   display: auto;