diff --git a/api/src/processing/services/youtube.js b/api/src/processing/services/youtube.js
index 94eab2b0..e3265b33 100644
--- a/api/src/processing/services/youtube.js
+++ b/api/src/processing/services/youtube.js
@@ -271,7 +271,7 @@ export default async function(o) {
 
         if (o.dubLang) {
             const dubbedAudio = selected.audio.find(i =>
-                i.language.startsWith(o.dubLang)
+                i.language?.startsWith(o.dubLang)
             );
 
             if (dubbedAudio && !dubbedAudio.isDefault) {