diff --git a/lib/media/drm_engine.js b/lib/media/drm_engine.js
index 3f9b3ff222..cf94cc4951 100644
--- a/lib/media/drm_engine.js
+++ b/lib/media/drm_engine.js
@@ -1307,8 +1307,9 @@ shaka.media.DrmEngine.prototype.onKeyStatusesChange_ = function(event) {
 
     // NOTE that we skip this if byteLength != 16.  This is used for the IE11
     // and Edge 12 EME polyfill, which uses single-byte dummy key IDs.
+    // However, unlike Edge and Chromecast, Tizen doesn't have this problem.
     if (this.currentDrmInfo_.keySystem == 'com.microsoft.playready' &&
-        keyId.byteLength == 16) {
+        keyId.byteLength == 16 && !/Tizen/.exec(navigator.userAgent)) {
       // Read out some fields in little-endian:
       let dataView = new DataView(keyId);
       let part0 = dataView.getUint32(0, true /* LE */);