diff --git a/ext/bg/js/audio-uri-builder.js b/ext/bg/js/audio-uri-builder.js
index 80e9cb9a..15cea995 100644
--- a/ext/bg/js/audio-uri-builder.js
+++ b/ext/bg/js/audio-uri-builder.js
@@ -48,8 +48,8 @@ class AudioUriBuilder {
         return url;
     }
 
-    async getUri(mode, definition, options) {
-        const handler = this._getUrlHandlers.get(mode);
+    async getUri(definition, source, options) {
+        const handler = this._getUrlHandlers.get(source);
         if (typeof handler === 'function') {
             try {
                 return await handler(definition, options);
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index eb88a6c1..adc6f13d 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -515,7 +515,7 @@ class Backend {
 
     async _onApiAudioGetUri({definition, source, optionsContext}) {
         const options = this.getOptions(optionsContext);
-        return await this.audioUriBuilder.getUri(source, definition, options);
+        return await this.audioUriBuilder.getUri(definition, source, options);
     }
 
     _onApiScreenshotGet({options}, sender) {
@@ -771,7 +771,7 @@ class Backend {
         }
 
         const options = this.getOptions(optionsContext);
-        return await this.audioUriBuilder.getUri(source, definition, options);
+        return await this.audioUriBuilder.getUri(definition, source, options);
     }
 
     async _audioInject(definition, fields, sources, optionsContext) {