diff --git a/src/tsconfig.monaco.json b/src/tsconfig.monaco.json
index bad9fb8cacc..acb682940ca 100644
--- a/src/tsconfig.monaco.json
+++ b/src/tsconfig.monaco.json
@@ -16,6 +16,7 @@
 		"declaration": true
 	},
 	"include": [
+		"typings/css.d.ts",
 		"typings/require.d.ts",
 		"typings/thenable.d.ts",
 		"typings/vscode-globals-product.d.ts",