diff --git a/extensions/amp-reach-player/0.1/amp-reach-player.js b/extensions/amp-reach-player/0.1/amp-reach-player.js
index 31c3eed77cd4..3e3db1918c3e 100644
--- a/extensions/amp-reach-player/0.1/amp-reach-player.js
+++ b/extensions/amp-reach-player/0.1/amp-reach-player.js
@@ -46,6 +46,7 @@ class AmpReachPlayer extends AMP.BaseElement {
 
     iframe.setAttribute('frameborder', 'no');
     iframe.setAttribute('scrolling', 'no');
+    iframe.setAttribute('allowfullscreen', 'true');
     iframe.src = 'https://player-cdn.beachfrontmedia.com/playerapi/v1/frame/player/?embed_id=' + encodeURIComponent(embedId);
     this.applyFillContent(iframe);
     this.element.appendChild(iframe);