diff --git a/TS.fsx b/TS.fsx
index 0e40b9032..30720c269 100644
--- a/TS.fsx
+++ b/TS.fsx
@@ -28,7 +28,6 @@ let rec DomTypeToTsType (objDomType: string) =
     | "Date" -> "Date"
     | "DOMHighResTimeStamp" -> "number"
     | "DOMString" -> "string"
-    | "DOMStringList" -> "string[]"
     | "DOMTimeStamp" -> "number"
     | "EndOfStreamError" -> "number"
     | "EventListener" -> "EventListenerOrEventListenerObject"
diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index dc7c5a2c4..4991132ad 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -7586,7 +7586,7 @@ declare var IDBCursorWithValue: {
 
 interface IDBDatabase extends EventTarget {
     readonly name: string;
-    readonly objectStoreNames: string[];
+    readonly objectStoreNames: DOMStringList;
     onabort: (this: this, ev: Event) => any;
     onerror: (this: this, ev: ErrorEvent) => any;
     version: number;
@@ -7652,7 +7652,7 @@ declare var IDBKeyRange: {
 }
 
 interface IDBObjectStore {
-    readonly indexNames: string[];
+    readonly indexNames: DOMStringList;
     keyPath: string | string[];
     readonly name: string;
     readonly transaction: IDBTransaction;
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 1d3f45624..d6edcc4f5 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -341,7 +341,7 @@ declare var IDBCursorWithValue: {
 
 interface IDBDatabase extends EventTarget {
     readonly name: string;
-    readonly objectStoreNames: string[];
+    readonly objectStoreNames: DOMStringList;
     onabort: (this: this, ev: Event) => any;
     onerror: (this: this, ev: ErrorEvent) => any;
     version: number;
@@ -407,7 +407,7 @@ declare var IDBKeyRange: {
 }
 
 interface IDBObjectStore {
-    readonly indexNames: string[];
+    readonly indexNames: DOMStringList;
     keyPath: string | string[];
     readonly name: string;
     readonly transaction: IDBTransaction;
diff --git a/inputfiles/overridingTypes.json b/inputfiles/overridingTypes.json
index 00eef78fc..0a0c3e873 100644
--- a/inputfiles/overridingTypes.json
+++ b/inputfiles/overridingTypes.json
@@ -899,5 +899,12 @@
         "interface": "MouseEvent",
         "name": "initMouseEvent",
         "signatures": ["initMouseEvent(typeArg: string, canBubbleArg: boolean, cancelableArg: boolean, viewArg: Window, detailArg: number, screenXArg: number, screenYArg: number, clientXArg: number, clientYArg: number, ctrlKeyArg: boolean, altKeyArg: boolean, shiftKeyArg: boolean, metaKeyArg: boolean, buttonArg: number, relatedTargetArg: EventTarget | null): void"]
+    },
+    {
+        "kind": "property",
+        "interface": "DataTransfer",
+        "readonly": true,
+        "name": "types",
+        "type": "string[]"
     }
  ]