diff --git a/src/controller/eme-controller.ts b/src/controller/eme-controller.ts
index 12fa12b35d2..fd81469b5e9 100644
--- a/src/controller/eme-controller.ts
+++ b/src/controller/eme-controller.ts
@@ -543,7 +543,7 @@ class EMEController extends EventHandler {
         const url = this.getLicenseServerUrl(keysListItem.mediaKeySystemDomain);
 
         logger.log(`Sending license request to URL: ${url}`);
-        const challenge = this.emeGenerateLicenseChallengeFunc(keysListItem.mediaKeySystemDomain, keyMessage);
+        const challenge = this.emeGenerateLicenseChallengeFunc(keysListItem, keyMessage);
         xhr.send(challenge);
       })
       .catch(e => {
diff --git a/src/utils/mediakeys-helper.ts b/src/utils/mediakeys-helper.ts
index 11605ea0382..c32e7169e24 100644
--- a/src/utils/mediakeys-helper.ts
+++ b/src/utils/mediakeys-helper.ts
@@ -1,3 +1,5 @@
+import { MediaKeysListItem } from '../controller/eme-controller';
+
 /**
  * @see https://developer.mozilla.org/en-US/docs/Web/API/Navigator/requestMediaKeySystemAccess
  */
@@ -16,9 +18,9 @@ const requestMediaKeySystemAccess = (function (): MediaKeyFunc | null {
   }
 })();
 
-export type GenerateLicenseChallengFunc = (keySystem: KeySystems, keyMessage: ArrayBuffer) => ArrayBuffer;
-const generateLicenseChallenge = (keySystem: KeySystems, keyMessage: ArrayBuffer): ArrayBuffer => {
-  switch (keySystem) {
+export type GenerateLicenseChallengFunc = (keySystemItem: MediaKeysListItem, keyMessage: ArrayBuffer) => ArrayBuffer;
+const generateLicenseChallenge = (keySystemItem: MediaKeysListItem, keyMessage: ArrayBuffer): ArrayBuffer => {
+  switch (keySystemItem.mediaKeySystemDomain) {
   // case KeySystems.PLAYREADY:
   // from https://github.com/MicrosoftEdge/Demos/blob/master/eme/scripts/demo.js
   /*
@@ -47,7 +49,7 @@ const generateLicenseChallenge = (keySystem: KeySystems, keyMessage: ArrayBuffer
     return keyMessage;
   }
 
-  throw new Error(`unsupported key-system: ${keySystem}`);
+  throw new Error(`unsupported key-system: ${keySystemItem.mediaKeySystemDomain}`);
 };
 
 export {