diff --git a/webview-ui/src/components/chat/ChatView.tsx b/webview-ui/src/components/chat/ChatView.tsx
index b358abaaa84..6f3ee16ec12 100644
--- a/webview-ui/src/components/chat/ChatView.tsx
+++ b/webview-ui/src/components/chat/ChatView.tsx
@@ -1016,7 +1016,7 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 		// labeled as `user_feedback`.
 		if (lastMessage && messages.length > 1) {
 			if (
-				lastMessage.text && // has text
+				typeof lastMessage.text === "string" && // has text (must be string for startsWith)
 				(lastMessage.say === "text" || lastMessage.say === "completion_result") && // is a text message
 				!lastMessage.partial && // not a partial message
 				!lastMessage.text.startsWith("{") // not a json object