diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 2157ac188..65466a9d8 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -1821,9 +1821,12 @@ declare var CryptoKeyPair: {
 };
 
 interface CSS {
-    supports(property: string, value?: string): boolean;
+    escape(value: string): string;
 }
-declare var CSS: CSS;
+
+declare var CSS: {
+    supports(property: string, value?: string): boolean;
+};
 
 interface CSSConditionRule extends CSSGroupingRule {
     conditionText: string;
diff --git a/inputfiles/addedTypes.json b/inputfiles/addedTypes.json
index 19a4affcd..a556f51de 100644
--- a/inputfiles/addedTypes.json
+++ b/inputfiles/addedTypes.json
@@ -3058,5 +3058,13 @@
         "interface": "HTMLElementEventMap",
         "name": "\"focusout\"",
         "type": "FocusEvent"
+    },
+    {
+        "kind": "method",
+        "name": "escape",
+        "interface": "CSS",
+        "signatures": [
+            "escape(value: string): string"
+        ]
     }
 ]
\ No newline at end of file