diff --git a/app/frontend/src/components/Answer/SpeechOutputAzure.tsx b/app/frontend/src/components/Answer/SpeechOutputAzure.tsx
index 2dabcb028a..ea181df295 100644
--- a/app/frontend/src/components/Answer/SpeechOutputAzure.tsx
+++ b/app/frontend/src/components/Answer/SpeechOutputAzure.tsx
@@ -44,7 +44,7 @@ export const SpeechOutputAzure = ({ answer, speechConfig, index, isStreaming }:
             return;
         }
         if (speechConfig.speechUrls[index]) {
-            playAudio(speechConfig.speechUrls[index]);
+            playAudio(speechConfig.speechUrls[index] ?? "");
             return;
         }
         setIsLoading(true);