diff --git a/client/src/api/fetch.ts b/client/src/api/fetch.ts
index 9fe0ec182..102d1ff29 100644
--- a/client/src/api/fetch.ts
+++ b/client/src/api/fetch.ts
@@ -74,7 +74,7 @@ export const streamFetch = ({
             if (!eventName || !data) return;
 
             if (eventName === sseResponseEventEnum.answer && data !== '[DONE]') {
-              const answer: string = data?.choices?.[0].delta.content || '';
+              const answer: string = data?.choices?.[0]?.delta?.content || '';
               onMessage({ text: answer });
               responseText += answer;
             } else if (
diff --git a/client/src/service/moduleDispatch/chat/oneapi.ts b/client/src/service/moduleDispatch/chat/oneapi.ts
index 1c47ca39d..ad4b745d6 100644
--- a/client/src/service/moduleDispatch/chat/oneapi.ts
+++ b/client/src/service/moduleDispatch/chat/oneapi.ts
@@ -324,7 +324,7 @@ async function streamResponse({
         const { data } = parseData.parse(item);
         if (!data || data === '[DONE]') return;
 
-        const content: string = data?.choices?.[0].delta.content || '';
+        const content: string = data?.choices?.[0]?.delta?.content || '';
         error = data.error;
         answer += content;