diff --git a/ext/bg/js/api.js b/ext/bg/js/api.js
index 1c3ad110..db849cc5 100644
--- a/ext/bg/js/api.js
+++ b/ext/bg/js/api.js
@@ -69,8 +69,8 @@ function apiCommandExec(command, params) {
     return utilBackend()._onApiCommandExec({command, params});
 }
 
-async function apiAudioGetUrl(definition, source, optionsContext) {
-    return audioGetUrl(definition, source, optionsContext);
+function apiAudioGetUrl(definition, source, optionsContext) {
+    return utilBackend()._onApiAudioGetUrl({definition, source, optionsContext});
 }
 
 function apiScreenshotGet(options, sender) {
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index 8ae5574c..96f28925 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -404,8 +404,8 @@ class Backend {
         handler(this, params);
     }
 
-    _onApiAudioGetUrl({definition, source, optionsContext}) {
-        return apiAudioGetUrl(definition, source, optionsContext);
+    async _onApiAudioGetUrl({definition, source, optionsContext}) {
+        return audioGetUrl(definition, source, optionsContext);
     }
 
     _onApiScreenshotGet({options}, sender) {