diff --git a/chatdesk-ui/components/chat/chat-helpers/index.ts b/chatdesk-ui/components/chat/chat-helpers/index.ts
index 4210829..f5e6871 100644
--- a/chatdesk-ui/components/chat/chat-helpers/index.ts
+++ b/chatdesk-ui/components/chat/chat-helpers/index.ts
@@ -100,7 +100,7 @@ export const handleRetrieval = async (
   const HIGH_THRESHOLD = 0.8
   const LOW_THRESHOLD = 0.5
 
-  let filteredResults
+  let filteredResults: RetrievedFileItem[] = []
 
   // 找出所有 ≥ 0.8 的结果
   const highSimilarity = results.filter(item => item.similarity >= HIGH_THRESHOLD)