diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index bc572dd3d..8be5f3626 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -2569,6 +2569,8 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * @param content The text and HTML tags to write.
       */
     writeln(...content: string[]): void;
+    createElement(tagName: "picture"): HTMLPictureElement;
+    getElementsByTagName(tagname: "picture"): NodeListOf<HTMLPictureElement>;
     addEventListener(type: "MSContentZoom", listener: (ev: UIEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureChange", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureDoubleTap", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
@@ -2981,6 +2983,7 @@ interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelec
     webkitRequestFullscreen(): void;
     getElementsByClassName(classNames: string): NodeListOf<Element>;
     matches(selector: string): boolean;
+    getElementsByTagName(tagname: "picture"): NodeListOf<HTMLPictureElement>;
     addEventListener(type: "MSGestureChange", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureDoubleTap", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureEnd", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
@@ -12641,6 +12644,14 @@ declare var HTMLTemplateElement: {
     new(): HTMLTemplateElement;
 }
 
+interface HTMLPictureElement extends HTMLElement {
+}
+
+declare var HTMLPictureElement: {
+    prototype: HTMLPictureElement;
+    new(): HTMLPictureElement;
+}
+
 declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
 
 interface ErrorEventHandler {
diff --git a/inputfiles/addedTypes.json b/inputfiles/addedTypes.json
index 9eac7fa3a..0b6d43156 100644
--- a/inputfiles/addedTypes.json
+++ b/inputfiles/addedTypes.json
@@ -360,5 +360,33 @@
         "interface": "StorageEvent",
         "name": "storageArea?",
         "type": "Storage"
+    },
+    {
+        "kind": "interface",
+        "name": "HTMLPictureElement",
+        "flavor":  "Web",
+        "extends": "HTMLElement",
+        "constructorSignatures": [
+            "new(): HTMLPictureElement"
+        ],
+        "properties": []
+    },
+    {
+        "kind": "method",
+        "interface": "Document",
+        "name": "createElement",
+        "signatures": ["createElement(tagName: \"picture\"): HTMLPictureElement"]
+    },
+    {
+        "kind": "method",
+        "interface": "Document",
+        "name": "getElementsByTagName",
+        "signatures": ["getElementsByTagName(tagname: \"picture\"): NodeListOf<HTMLPictureElement>"]
+    },
+    {
+        "kind": "method",
+        "interface": "Element",
+        "name": "getElementsByTagName",
+        "signatures": ["getElementsByTagName(tagname: \"picture\"): NodeListOf<HTMLPictureElement>"]
     }
 ]