diff --git a/externs/pictureinpicture.js b/externs/pictureinpicture.js
index 12f92e193a..e850b5e156 100644
--- a/externs/pictureinpicture.js
+++ b/externs/pictureinpicture.js
@@ -53,7 +53,6 @@ HTMLMediaElement.prototype.webkitPresentationMode;
 
 /**
  * @typedef {{
- *   initialAspectRatio: (number|undefined),
  *   width: (number|undefined),
  *   height: (number|undefined),
  *   copyStyleSheets: (boolean|undefined),
diff --git a/ui/pip_button.js b/ui/pip_button.js
index f33aa216ce..34f5a9b93b 100644
--- a/ui/pip_button.js
+++ b/ui/pip_button.js
@@ -162,7 +162,8 @@ shaka.ui.PipButton = class extends shaka.ui.Element {
     const pipPlayer = this.videoContainer_;
     const rectPipPlayer = pipPlayer.getBoundingClientRect();
     const pipWindow = await window.documentPictureInPicture.requestWindow({
-      initialAspectRatio: rectPipPlayer.width / rectPipPlayer.height,
+      width: rectPipPlayer.width,
+      height: rectPipPlayer.height,
       copyStyleSheets: true,
     });