diff --git a/extensions/html/server/src/modes/cssMode.ts b/extensions/html/server/src/modes/cssMode.ts
index 6e8d80a3351..75ded3c1d06 100644
--- a/extensions/html/server/src/modes/cssMode.ts
+++ b/extensions/html/server/src/modes/cssMode.ts
@@ -11,7 +11,7 @@ import { LanguageMode } from './languageModes';
 
 export function getCSSMode(embeddedCSSDocuments: LanguageModelCache<TextDocument>): LanguageMode {
 	let cssLanguageService = getCSSLanguageService();
-	let cssStylesheets = getLanguageModelCache<Stylesheet>(10, 60, document => cssStylesheets.get(document));
+	let cssStylesheets = getLanguageModelCache<Stylesheet>(10, 60, document => cssLanguageService.parseStylesheet(document));
 
 	return {
 		getId() {