diff --git a/frontend/src/components/ChatPanel/index.tsx b/frontend/src/components/ChatPanel/index.tsx
index f4515c9..0007bda 100644
--- a/frontend/src/components/ChatPanel/index.tsx
+++ b/frontend/src/components/ChatPanel/index.tsx
@@ -15,7 +15,7 @@ interface ChatPanelProps {
   connectionStatus: ConnectionStatus;
   isProcessing?: boolean;
   isVADReady?: boolean;
-  vadError?: string;
+  vadError?: string | null;
   isMicOn?: boolean;
   isSpeaking?: boolean;
   onSendText?: (text: string) => void;